List of consorts of Montferrat
The Marchioness and Duchesses of Montferrat were the consorts of the rulers of a territory in Piedmont south of the Po and east of Turin called Montferrat. The March of Montferrat was created by Berengar II of Italy in 950 during a redistribution of power in the northwest of his kingdom.
Source: Wikipedia — List of consorts of Montferrat (CC BY-SA 4.0)