Marquess of Montferrat William, VII
Generation: 1
1. Marquess of Montferrat William, VII Family/Spouse: Marchioness of Montferrat Isabel de Clare. Isabel (daughter of Eighth Earl of Clare, Sixth Earl of Hertford, 6th Earl of Gloucester Richard de Clare, IV and Maud de Lacy) was born in May 1240 in Tonbridge, Kent, England; died in 1271. [Group Sheet] [Family Chart]