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Male Marchese Guglielmo of Montferrat VI Click to view Marchese Guglielmo of Montferrat VI in the family tree

Guglielmo was born in 1172 in Monferrato, Italy.1   Guglielmo's father was King of Thessalonica Bonifacio di Montferrat I (II) and his mother was Elena di Busca.  His paternal grandparents were Margrave Guillaume de Montferrat VI and Princess of Austria Judith von Brandenburg. He had a sister named Agnes.  He was the older of the two children.  He died at the age of 53 on September 17th, 1225.1 

Family Details of Guglielmo's family with Berta Clavesana Mambascaro Cortemiglia

1 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=PED&db=bevangenealogy&id=I34137&style=TABLE

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