"William I, Marquess of Montferrat"
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Title "William I, Marquess of Montferrat" Publisher Wikipedia: The Free Encyclopedia. Wikimedia Foundation, Inc. https://en.wikipedia.org/wiki/William_I,_Marquess_of_Montferrat, 27 Jan 2018 Source ID S5035 Linked to Aleramo del Monferrato, Marquess of Montferrat and Liguria
Guglielmo I del Monferrato, Marquess of Montferrat