Alexander married Margaret Plantagenet on 26 Dec 1251. Margaret (daughter of Henry III of Winchester Plantagenet and Eleanor Of Provence Berenguer) was born on 29 Sep 1240 in Windsor, Berkshire, England; died on 26 Feb 1275 in Cupar, Fife, Scotland; was buried in 1275 in Dunfermline, Fife, Scotland. [Group Sheet] [Family Chart]