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,
Baldwin I, Margrave of Flanders Baldwin I, Margrave of Flanders Baldwin I (probably 830s – 879), also known as Baldwin Iron Arm (the epithet is first recorded in the 12th century), was the first Margrave of Flanders. At the time Baldwin first appears in the records he was already a count, presumably in the area of Flanders, but this is not known. Count Baldwin rose to prominence when he eloped with princess Judith, daughter of Charles the Bald, king of West Francia. Judith had previously been married to Æthelwulf and his son (from an earlier marriage) Æthelbald, kings of Wessex, but after the latter's death