Marquess of Montferrat William, VII
( = Descendancy chart to this point, = Expand, = Collapse)
- 1 Marquess of Montferrat William, VII [1]
- + Marchioness of Montferrat Isabel de Clare b. May 1240 d. 1271
- + Marchioness of Montferrat Isabel de Clare b. May 1240 d. 1271