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 II, Margrave of Flanders Baldwin II, Margrave of Flanders Baldwin II ( 865 – 10 September 918) was the second margrave (or count) of Flanders, ruling from 879 to 918. He was nicknamed the Bald ("Calvus") after his maternal grandfather, King Charles the Bald. Baldwin II was born around 865 to Baldwin I of Flanders and Judith of Flanders, the great-granddaughter of Charlemagne. The early years of Baldwin's rule were marked by a series of devastating Viking raids into Flanders. By 883 CE, he was forced to move north to Pagus Flandransis, which became the territory most closely associated with the Counts of Flanders.