▁of ▁K s ani . ▁This ▁view ▁was ▁further ▁developed ▁by ▁the ▁modern ▁gene alog ist ▁Cy ril ▁T ou man off , ▁who ▁identified ▁R ati ▁Ts irk v ale li ▁Gl on is - T av ad ze , ▁the ▁pro th on ot ary ▁of ▁Georgia ▁( 1 4 5 8 / 6 8 ) ▁and ▁a ▁son ▁of ▁Duke ▁K ven ip ne vel ▁II ▁of ▁K s ani , ▁as ▁the ▁for ef ather ▁of ▁the ▁Rat ish v ili . ▁An ▁alternative ▁hypothesis ▁makes ▁the ▁Rat ish v ili ▁a ▁branch ▁of ▁the ▁Bar at ash v ili - Or bel iani ▁dynast y ; ▁yet ▁another ▁has ▁it ▁that ▁both ▁these ▁gene alog ies ▁are ▁correct ▁and ▁there ▁were , ▁in ▁fact , ▁two ▁Rat ish v ili ▁families ▁of ▁different ▁origin . ▁ ▁History ▁The ▁first ▁documented ▁mention ▁of ▁the ▁Rat ish v ili , ▁in ▁the ▁person ▁of ▁Ka ik hos ro ▁and ▁his ▁sons — J esse , ▁Bez han , ▁and ▁Zur ab — as ▁princes ▁occurs ▁in ▁the ▁ 1 6 8 8 ▁char ter ▁of ▁Prince ▁Royal ▁Bag rat . ▁A ▁branch ▁of ▁the ▁family ▁was ▁established ▁in ▁Russia ▁in ▁ 1 7 2 4 ▁with ▁the ▁em igration ▁of ▁Prince ▁Zur ab ▁Rat ish v ili ▁( I gor ▁R atie v ) ▁in ▁the ▁suite ▁of ▁V ak ht ang ▁VI ▁of ▁K art li . ▁Those ▁remaining ▁in ▁Georgia ▁had ▁their ▁estate ▁in ▁K so v ris