Wie trouwde met Sibil·la de Mataplana?

William VI or Guillem VI (died 1161) was the eldest son of William V and his wife Ermessende, daughter of Count Peter I of Melgueil. William succeeded his father in the lordship of Montpellier in 1121, while still a minor, under his mother's guardianship. He suppressed a revolt of the bourgeoisie in 1143 and participated in several military campaigns of the Reconquista in Spain (1134, 1146–47). He also increased the public character of the lordship in Montpellier and supported the growth of its trade.