was sent to Bulgarian Tsar Kaloyan. The loyal Raimbaut de Vaqueiras, who had followed him to the East, probably died with him: it is significant that he composed no planh (lament) in his memory. Family Boniface was first married c. 1170 to Helena del Bosco. They had three children: William VI, (c. 1173-17 September 1226). Marquis of Montferrat. Beatrice, m. Enrico del Carretto, Marquis of Savona, as the second of his three wives; she is the Bel Cavalher (Fair Knight) of Vaqueiras's songs, composed in the 1190s. Agnes of Montferrat (d. 1207), m. Henry of Flanders, Latin emperor of Constantinople, in 1207 In 1205 in Constantinople he married Margaret of Hungary, daughter of King Béla III of Hungary and widow of Emperor Isaac II Angelos. They had one child: Demetrius, born c. 1205, who was King of Thessalonica. References Sources Further reading Vaqueiras, Raimbaut de. The Epic Letter (external link to bilingual text) 1150s births 1207 deaths Christians of the Fourth Crusade Aleramici Marquesses of Montferrat Kings of Thessalonica 12th-century Italian nobility 13th-century Italian nobility 12th century in the Byzantine Empire 13th century in the Byzantine Empire Founding monarchs 13th-century Roman Catholics 12th-century Roman Catholics