Boniface I, Marquess of Montferrat the independent city communes of the Lombard League. Boniface's eldest brother, William, had died in 1177, soon after marrying Sibylla, the heiress presumptive to the Kingdom of Jerusalem. In 1179, the Byzantine emperor Manuel I Comnenus offered his daughter Maria Porphyrogenita as a bride to one of the sons of William V. Since Boniface, like his older brother Conrad, was already married, and Frederick was a priest, the youngest brother, Renier, married her instead, only to be murdered along with her during the usurpation of Andronicus. In 1183, Boniface's nephew Baldwin V was crowned co-king of Jerusalem. William V went
Baldwin VI, Count of Flanders Baldwin VI, Count of Flanders Baldwin VI ( – 17 July 1070), also known as Baldwin the Good, was Count of Hainaut from 1051 to 1070 (as Baldwin I) and Count of Flanders from 1067 to 1070. Baldwin was the eldest son of Baldwin V of Flanders and Adela of France, a daughter of king Robert II of France and Constance of Arles. Baldwin VI was also the brother of Matilda of Flanders, Queen consort of England and wife of William the Conqueror, King of England. His father arranged his marriage, under threat of arms, to Richilde, the widow of