▁ 1 0 9 3 ▁– ▁after ▁ 1 1 5 2 ) ▁was ▁the ▁third ▁son ▁of ▁By z antine ▁Emperor ▁Alex ios ▁I ▁Kom nen os ▁and ▁Em press ▁I rene ▁Dou k ain a . ▁He ▁was ▁raised ▁to ▁the ▁high ▁rank ▁of ▁se bas to kr ator ▁by ▁his ▁older ▁brother ▁John ▁II ▁Kom nen os ▁in ▁reward ▁for ▁his ▁support , ▁but ▁they ▁later ▁fell ▁out , ▁as ▁Isaac ▁began ▁to ▁cov et ▁the ▁throne . ▁▁ ▁In ▁ 1 1 3 0 , ▁Isaac ▁and ▁his ▁sons ▁fled ▁to ▁ex ile ▁after ▁becoming ▁involved ▁in ▁a ▁consp i racy ▁against ▁John . ▁For ▁several ▁years , ▁they ▁w ander ed ▁in ▁Asia ▁Minor ▁and ▁the ▁Lev ant , ▁trying ▁to ▁gain ▁support ▁from ▁the ▁local ▁r ul ers , ▁but ▁ultimately ▁in ▁vain . ▁John ' s ▁military ▁success es ▁forced ▁Isaac ▁to ▁seek ▁a ▁recon c ili ation ▁with ▁his ▁brother ▁in ▁ 1 1 3 8 , ▁although ▁he ▁did ▁not ▁give ▁up ▁his ▁designs ▁on ▁the ▁throne . ▁In ▁ 1 1 3 9 , ▁after ▁his ▁oldest ▁son ▁defect ed ▁to ▁the ▁Sel j uk ▁Tur ks , ▁Isaac ▁was ▁ex iled ▁to ▁Her acle a ▁Pont ica . ▁During ▁the ▁struggle ▁for ▁John ' s ▁succession ▁in ▁ 1 1 4 3 , ▁he ▁supported ▁the ▁un success ful ▁candid acy ▁of ▁his ▁elder ▁nep hew , ▁like wise ▁named ▁Isaac , ▁over ▁his ▁younger ▁nep hew ▁Manuel ▁I ▁Kom nen os