Isabelle married Rudolf II of Austria Habsburg, Duke of Austria on 6 Feb 1284 in Basel. Rudolf (son of Rudolf I of Austria Habsburg, Holy Roman Emperor and Gertrude of Hohenburg) was born in 1270; died on 10 May 1290. [Group Sheet] [Family Chart]
Family/Spouse: Princess Joan of Acre Plantagenet. Joan (daughter of Edward I Longshanks Plantagenet, King of England and Eleanor (Leonor) of Castile, Countess de Ponthieu) was born in 1272 in Acre, Palestine; died on 23 Apr 1307 in Clare, Suffolk, England. [Group Sheet] [Family Chart]