Isabella I of Jerusalem tried to play Isabella and her husband off against him, but Humphrey did homage to the royal couple. Isabella was the daughter of Amalric, King of Jerusalem, by his second wife, Maria Comnena. Maria Comnena (who was a grandniece of the Byzantine Emperor, Manuel I Komnenos) married Amalric on 29 August 1171. Isabella was born before September 1172. Amalric died unexpectedly on 11 July 1174. His son by his first marriage, Baldwin IV, was crowned king two weeks later. Before long, it became obvious that Baldwin suffered from lepromatous leprosy. To secure the succession of the ailing king, his sister,
Leo I, Prince of Armenia of Armenian Cilicia. It is likely that his mother was the great-granddaughter of Bardas Phokas. When Constantine I died, Leo’s brother Thoros I succeeded him; Leo may have ruled in the eastern part of “the Mountains” during the lifetime of his brother (although the basis of this proposition is not known). Sometime between 1100 and 1103, Count Baldwin II of Edessa gave his sister in marriage to Leo; but the name and origin of his wife are not known with certainty. It is also possible that his wife was Baldwin II’s sister-in-law, a daughter of the Armenian Gabriel of Melitene.