William married Mary, Princess Of Scotland in 1425 in , , , Scotland. Mary, (daughter of Robert Iii (John Scotland and Annabella Drummond) was born about 1380 in Of, Dunfermline, Fifeshire, Scotland; died in 1458 in , , , Scotland; was buried in Strathblanechapl, Strathblane, Stirlingshire, Scotland. [Group Sheet] [Family Chart]