— Guglielmo III del Monferrato, Marquess of Montferrat. Guglielmo (son of Ottone I del Monferrato, Marquess of Montferrat) was born Abt 970, Monferrato, Asti, Piemonte, Italy; died 1042, Monferrato, Asti, Piemonte, Italy. [Group Sheet]

1. Ottone del Monferrato was born Abt 1015, Monferrato, Asti, Piemonte, Italy; died 20 Nov 1084, Monferrato, Asti, Piemonte, Italy.
2. Enrico del Monferrato