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,
Philip I of France Western Europe, his name was of Greek origin, being bestowed upon him by his mother. Although he was crowned king at the age of seven, until age fourteen (1066) his mother acted as regent, the first queen of France ever to do so. Baldwin V of Flanders also acted as co-regent. Following the death of Baldwin VI of Flanders, Robert the Frisian seized Flanders. Baldwin's wife, Richilda requested aid from Philip, who was defeated by Robert at the battle of Cassel in 1071. Philip first married Bertha in 1072. Although the marriage produced the necessary heir, Philip fell in love