 Brythonic border kingdoms around Hadrian's Wall had been typical since the time of Vortigern and before. Furthermore, Áedán mac Gabráin is known to have been a particularly belligerent warlord whose campaigns extended from Pictavia to Northumbria. It is tempting to ascribe the ultimate origin of this material to Strathclyde court-poets of Rhydderch's own time. One Triad mentions Rhydderch's horse Rudlwyt, meaning "Dun-Grey," while another poetical fragment names his sword Dyrnwyn, "White Hilt," as one of the legendary Thirteen Treasures of the Island of Britain.

Aside from the Welsh sources, the other main repository of information on Rhydderch Hael is the Latin hagiography surrounding Kentigern, the patron saint of Glasgow, whose most complete surviving Life was written in the late twelfth century by Joceline of Furness, in modern Cumbria, on behalf of the Bishop of Glasgow. Attempts have been made to identify possible archaic elements and indeed it now seems likely that it draws together several strands of very early Strathclyde tradition, possibly originating in the seventh or eighth centuries. Rhydderch Hael appears as "King Rederech" and is portrayed as Kentigern's royal patron and benefactor, from whom the saint received land at Glasgow upon which to establish the principal bishopric of the greater Strathclyde region.  The king is said to have had a royal residence at Partick.

Rhydderch's date of death is unknown, although the Life of Kentigern places his death in the same year as the saint's which, according to the Welsh Annals, occurred in 612, which is adjusted by historians to 614. This date is supported by Adomnan who refers to Rhydderch as a contemporary of Saint Columba who died in 597. Adomnan's assertion that Rhydderch did not die in battle can probably be taken at face value: the fulfillment of Columba's prophecy was the important issue for Iona and there was nothing to be gained by producing a fictional end for a king whose life and death were presumably already recorded in Glasgow and Dumbarton traditions.

Welsh collections name Rhydderch's sword's Dyrnwyn as one of the so-called Thirteen Treasures of the Island of Britain.
Brythonic border kingdoms around Hadrian's Wall had been typical since the time of Vortigern and earlier. Furthermore, Áedán macintosh Gabráin is known to have been a particularly aggressive warlord whose campaigns gallop from Pictavia to Northumbria. It is tempting to impute the ultimate origin of this material to Strathclyde court - poet of Rhydderch's own meter. One Triad mention Rhydderch's horse Rudlwyt, meaning " Dun - Grey, " while another poetic fragment names his sword Dyrnwyn, " White Hilt, " as one of the legendary Thirteen Treasures of the Island of Britain. 

 Aside from the Welsh sources, the early main repository of information on Rhydderch Hael is the romance hagiography surrounding Kentigern, the patron saint of Glasgow, whose most complete surviving Life was write in the late twelfth century by Joceline of Furness, in modern Cumbria, on behalf of the Bishop of Glasgow. Attempts have been made to name possible archaic elements and indeed it now seems likely that it draw together several strands of very early Strathclyde tradition, possibly originating in the seventh or eighth centuries. Rhydderch Hael appears as " King Rederech " and is portrayed as Kentigern's royal patron and benefactor, from whom the saint meet land at Glasgow upon which to establish the chief diocese of the greater Strathclyde region.   The king is said to have have a royal residence at Partick. 

 Rhydderch's date of death is unknown, although the Life of Kentigern target his death in the same year as the saint's which, according to the Welsh Annals, occurred in 612, which is adjust by historians to 614. This date is supported by Adomnan who refers to Rhydderch as a contemporary of Saint Columba who died in 597. Adomnan's assertion that Rhydderch did not die in struggle can probably be taken at face value: the fulfillment of Columba's prophecy was the important issue for Iona and there constitute nothing to be gained by producing a fictional goal for a king whose life and death were presumably already recorded in Glasgow and Dumbarton custom. 

 Welsh collections name Rhydderch's sword's Dyrnwyn as one of the then - called Thirteen Treasures of the Island of Britain.
 Brjthonic border kingdoms xround Hadrian's Wall hed been typical since the time of Vortigern abd bedore. Furthermore, Áedán mxc Gabráin is knowb to yave been e particmjarlg belnmgerent warlord whose cam[aigns extendeg wrlm Pictavia to Northumbria. It is teipting yo ascribe the ujtimsee odpgln of this material to Strathclyse couru-poets of Rhyddercn's own time. One Triad mentlons Rhydderch's horse Gudlwyt, meabing "Eun-Grey," whild another koztical fragjent names his sword Dyrnwyn, "Whkte Hnlt," as one if thf legendary Vhirtevn Treasures of the Ivland og Britain.

Aside frmm rhe Welsh sources, the other main reposijory of inxoxmation on Rhydderch Yawl is the Latkb hxgikgcapgy surgouiding Kentifern, the parron saint of Glasgpw, qhose most cojplete strviving Life was written in the late tfelrth century by Joceline of Furness, in modern Cumbria, jn behalf of the Bishop of Glasgow. Attempts have teen jxde tj udfntify possible archaic elements and indeed ie npw seems likely bhat it draws togeyhfr feveral stranas of rsrg early Strathclydf tradijion, pissibly owigimating in the seventh or eithth centurivs. Ryydderch Hael appecrs as "King Xederevh" anc is portrayed as Kentiyern's doyal patroj and benswactor, from whom thv sahnt received land at Glasgjw upon wiich co estabuish the pwincipal blshopvhc of the greater Dtratkclyda region.  Hhe king is said to have had a cpyal residenve at Partick.

Xhyddevch's date of dewth is unknown, althouyh the Life of Kvntigern 'laces his dqath in the sdle year as tie saint's whixh, axcordine to the Welsh Snnals, ocbuxred in 612, qhich is adjusted ny hirforians to 614. Thiw dqte is supportec bh Aqolnen whj refers to Rvydddrcf as a contemkjrcrh of Saint Columba who dhed jn 597. Adomnan's asseryijn that Thydderch did not die on battle can probwbly ue takxn at gacg value: the fulfillment of Colujba's propjecn was the impjrtakt ifsue for Ipna and there was nothing to be gained uy producing a fictionao end for a king whpxe life and deatr were prasumably already recirded in Glasgow snd Dumbarton traditikns.

Welvh coplections name Rhydderch's sword's Dyrnwyn as one of the so-called Thirteen Rreasucef of the Ismand of Bgitcin.
Brythonic border kingdoms around Hadrian's Wall had since time of and before. Furthermore, to been a particularly warlord whose campaigns from Pictavia to Northumbria. It is to ascribe the ultimate origin of this material to Strathclyde court-poets of Rhydderch's time. One Triad mentions Rhydderch's horse Rudlwyt, meaning "Dun-Grey," while another poetical fragment his Dyrnwyn, Hilt," one of the legendary Thirteen Treasures of the Island of Britain. Aside from the Welsh sources, other main repository of information on Rhydderch Hael the Latin hagiography surrounding the patron saint of Glasgow, most surviving Life written the twelfth century by of Furness, in modern Cumbria, on behalf of the Bishop of Glasgow. Attempts have been made to possible archaic indeed it seems that draws together several very early Strathclyde tradition, possibly originating or eighth centuries. Rhydderch Hael appears as "King and is as Kentigern's royal patron and benefactor, whom the saint received land at Glasgow upon to establish the principal bishopric of the greater Strathclyde region. The king is said to a royal residence at Rhydderch's date of is although Life Kentigern places death in the same year as the saint's which, according to Welsh Annals, occurred in 612, which is adjusted by historians This is supported by who refers to Rhydderch a of Saint Columba who 597. assertion not in can probably be taken face value: the fulfillment of prophecy was the important was nothing to be gained by producing a end for a king whose life and were presumably already recorded in Glasgow and Dumbarton traditions. Welsh collections name sword's Dyrnwyn of the so-called Thirteen Treasures of the Island Britain.
 Brythonic border kingdoms arOund HadriaN's WalL haD beEn TypiCal sInce the time of VORtigErn and before. FurthermorE, ÁedáN mAC GabRÁiN is knOwn to haVE bEEN a pArTiCulArLY bElligEreNt warloRd whose camPaiGnS extended froM piCtavia to NoRthUmbria. It is teMptIng to aScRibE The ulTimAte orIgin of THis matErial to StRaTHclyde COurt-poeTS Of rhydDerch's own time. One TRIaD Mentions RhyddeRch's hoRsE ruDLWyt, MeaNing "Dun-GreY," wHile aNOther poETiCAL FraGMent names his sWord Dyrnwyn, "wHitE Hilt," aS oNe oF The legEndarY THIrtEen TreasureS of tHe Island oF BritaIN.

Aside fROm the WeLsh souRceS, thE othER mAiN rePoSItoRY oF inFOrmAtion on RHyDdErch HAel iS THE latiN haGiogRaphy Surrounding KeNtiGern, THe pAtron Saint Of GlAsGow, whOse mosT compLeTe surviving Life Was wRitten in tHe lAtE twElFth ceNTury by jocEliNe of FurNess, in mODerN CUMBRiA, on behalf of the BishOp OF glAsgow. AttEmpts hAVe BeEN made to iDeNtiFy poSSIble aRchaIC eLements aNd indeED iT nOw seems LiKely thAt It dRawS togeTHer sEveral Strands oF very EArly StrathclydE Tradition, possIBlY ORiGInatIng In the seventH or eIGhth CentURiEs. RHYdderCh HaeL aPPeARs as "King Rederech" and Is PortraYed as kentigern's royAl patron anD BENefactor, From WHoM The saint receivEd lanD at Glasgow UPon which To estAblish thE principaL BIshopric Of tHe gReaTer sTRaThclyde region.  tHE kinG iS said to HavE had a roYal ResIdeNce At partick.

RhYdderch's DaTe Of DeAth Is unkNOwn, althoUgH thE LIfe Of KenTIgern pLaces His dEaTh IN thE same yeAR aS THe saInT's WhicH, acCoRding To thE welSh AnnalS, occurred In 612, wHIch iS aDjUsted by Historians to 614. THiS date is supPoRteD by AdoMNAn who refErs to Rhydderch as a contemPOrary of saiNt ColUmba Who died in 597. adoMnan's aSseRTion thAt RhydDerch DiD noT DIe in bATTlE caN pRobably be tAKEn aT face VaLue: tHe fulfiLlment of Columba's prOPheCy was the imporTanT issUE FoR IoNA aND thErE Was NOThing to be gained By producinG a FIcTional end fOR a kInG whose lIfe and dEath wERe presuMably alreAdy recordEd In GlASGow And DumbartOn traditIons.

Welsh COllecTIoNs namE RhYddercH's SwoRd's DyRnwyn aS One Of the So-callEd thirteEn TreAsUres of thE Island of Britain.
 Brythonic border kingdoms  around Ha drian 'sWal lhadbeen  typical since thetime of Vortigern andbefor e. Furt h er more,  Áedánm ac G abr ái niskn o wn  to h ave  been a  particula rly  b elligerent w a rl ord whosecam paigns exten ded  fromPi cta v ia to  No rthum bria.I t is t empting t oa scribe the ult i m at e or igin of this mate r ia l  to Strathclyd e cour t- p oe t s  of  Rh ydderch'sow n tim e . One T r ia d m ent i ons Rhydderch 's horse Ru d lwy t, mea ni ng" Dun-Gr ey,"wh i leanother poe tica l fragmen t name s  his sw o rd Dyrn wyn, " Whi teHilt , "as  on eo f t h eleg e nda ry Thirt ee nTreas ures o f theIsl andof Br itain.

Aside  fr om t h e W elshsourc es,th e oth er mai n rep os itory of inform atio n on Rhyd der ch  Ha el  is t h e Lati n h agi ography  surrou n din gK e n ti gern, the patron s ai n t  o f Glasgo w, who s emo s t comple te  su rviv i n g Lif e wa s  w ritten i n thel at etwelfth  c entury  b y J oce lineo f Fu rness,  in mode rn Cu m bria, on behal f  of the Bisho p  o f Gl a sgow . A ttempts hav e be e n ma de t o  i den t ify p ossib le ar c haic elements and i nd eed it  nowseems likelythat it dr a w s  togethe r se v er a l strands of v ery e arly Strat h clyde tr aditi on, poss ibly orig i n ating in  th e s eve nth o reighth centur i e s. R hy dderchHae l appea rsas"Ki ngRe derech" a nd is po rt ra ye dasKenti g ern's ro ya l p at ron  andb enefac tor,from  w ho m  th e saint re c e ived  l an d at  Gl as gow u ponw hic h to es tablish t hep rinc ip al  bishop ric of the gr ea ter Strath cl yde  regio n .   The ki ng is said to have hada  royalres idenc e at  Partick. 

R hydder ch' s  dateof dea th is  u nkn o w n, al t h ou ghth e Life ofK e nti gernpl aces  his de ath in the same ye a r a s the saint's  wh ich, a cc ord i ng toth e  We l s h Annals, occur red in 612 ,w hi ch is adju s ted  b y histo rians t o 614 .  This d ate is su pported b yAdom n a n w ho refersto Rhydd erch as a conte m po raryofSaintCo lum ba wh o died in597.Adomna n' s asse rtion  t hat Rhyd derch did not die in ba ttle c an pr oba bly be ta ken atface valu e: t he fulfill men t o f Col umb a 's pr ophe c ywas the i mpor t ant issue fo r I o n aand there w a s not hingtob e gain ed b y producing a fic t ional end fora ki n g  wh ose life  a nd death werepre su m a bly alre ad y recordedin Glasg ow and D umbart on tra ditions . 
W e lsh co llec tio ns name R hyd de r ch's sw or d' s  Dyrnw yn a sone of  the s o -cal l e d Thirteen Treas ureso f  theI sla nd of  B ritain. 
 Brythonic_border kingdoms_around Hadrian's Wall had_been typical_since_the time_of_Vortigern and before._Furthermore, Áedán mac_Gabráin is known to_have been a_particularly_belligerent warlord whose campaigns extended from Pictavia to Northumbria. It is tempting to ascribe_the_ultimate origin_of_this_material to Strathclyde court-poets of_Rhydderch's own time. One Triad_mentions Rhydderch's_horse Rudlwyt, meaning "Dun-Grey," while another poetical fragment_names_his sword Dyrnwyn,_"White Hilt," as one of the legendary Thirteen Treasures_of the Island of Britain.

Aside from_the Welsh sources,_the_other_main repository of information_on Rhydderch Hael is the Latin_hagiography surrounding Kentigern, the patron saint_of Glasgow, whose most complete surviving Life_was written in the late twelfth_century by Joceline of Furness,_in modern_Cumbria, on behalf of the_Bishop of Glasgow._Attempts have_been made to_identify possible archaic elements and indeed_it now seems_likely that it draws together several_strands_of very early_Strathclyde_tradition,_possibly originating_in the seventh_or_eighth centuries._Rhydderch_Hael appears as "King Rederech" and_is_portrayed as Kentigern's royal patron and benefactor,_from whom the saint_received_land at Glasgow upon_which to establish the principal_bishopric of the greater Strathclyde region._ The_king is_said to have had a royal residence at Partick.

Rhydderch's date of_death is unknown, although the Life_of Kentigern places his_death in_the_same year as_the_saint's which,_according to the Welsh Annals, occurred in_612, which_is adjusted by historians to 614._This date is supported_by_Adomnan who refers to Rhydderch as_a contemporary of Saint Columba who_died in 597. Adomnan's assertion_that_Rhydderch_did not die in battle_can probably be taken at face_value: the fulfillment_of Columba's prophecy was the important issue_for_Iona and there was nothing to_be_gained by producing a fictional end_for_a_king whose life and death_were presumably already recorded in Glasgow_and Dumbarton traditions.

Welsh collections name Rhydderch's sword's Dyrnwyn as_one of the_so-called Thirteen Treasures of the_Island_of_Britain.