▁R ans om ▁and ▁The ▁Summer ▁of ▁the ▁Dan es . ▁He ▁acts ▁sh rew d ly ▁to ▁keep ▁Wales ' s ▁borders ▁secure , ▁and ▁sometimes ▁to ▁expand ▁them , ▁during ▁the ▁civil ▁war ▁between ▁King ▁Stephen ▁and ▁Mat ilda , ▁and ▁sometimes ▁acts ▁as ▁an ▁al ly ▁to ▁Cad f ael ▁and ▁his ▁friend , ▁Sher iff ▁Hugh ▁Ber ing ar . ▁ ▁Cad wal adr ▁also ▁appears ▁in ▁both ▁these ▁nov els ▁as ▁a ▁source ▁of ▁gr ief ▁for ▁his ▁brother . ▁O w ain ▁appears ▁as ▁a ▁minor ▁character ▁in ▁nov els ▁of ▁Sh aron ▁Kay ▁Pen man ▁concerning ▁Henry ▁II ▁and ▁Ele an or ▁of ▁Aqu itaine ▁( When ▁Christ ▁and ▁His ▁Sain ts ▁S le pt ▁and ▁Time ▁and ▁Ch ance ). ▁Her ▁focus ▁with ▁respect ▁to ▁O w ain ▁is ▁on ▁the ▁fl uct u ating ▁and ▁fact ious ▁relationship ▁between ▁England ▁and ▁Wales . ▁ ▁He ▁also ▁appears ▁in ▁the ▁Sarah ▁Wood bury ▁' G are th ▁and ▁G wen ▁Med ieval ▁Myst ery ▁Series ' ▁of ▁books . ▁ ▁References ▁ ▁S ources ▁▁▁▁▁▁▁ ▁O w ain ▁Category : Mon arch s ▁of ▁G w yn ed d ▁Category : Pe ople ▁ex communic ated ▁by ▁the ▁Catholic ▁Church ▁Category : 1 1 0 0 s ▁birth s ▁O w ain ▁G w yn ed d , ▁Prince ▁of ▁G w yn ed d ▁Category : 1 2 th - century ▁Wel sh ▁monarch s ▁Category : Wel sh ▁princes ▁Category : Wel sh