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 I, Latin Emperor Baldwin I, Latin Emperor Baldwin I (; ; July 1172 – ) was the first emperor of the Latin Empire of Constantinople. As Count of Flanders and Hainaut, he was one of the most prominent leaders of the Fourth Crusade, which resulted in the sack of Constantinople and the conquest of large parts of the Byzantine Empire, and the foundation of the Latin Empire. He lost his final battle to Kaloyan, the emperor of Bulgaria, and spent his last days as his prisoner. Baldwin was the son of Baldwin V, Count of Hainaut, and Margaret I, Countess of Flanders. When