Joan married Henry De Percy, [BARON PERCY] in May 1365 in , Witham, Lincolnshire, England. Henry (son of Henry De Percy, [BARON PERCY] and Idonea De Clifford) was born in 1320 in Of, Castle, Alnwick, Northumberland; was christened in (46-1368); died on 18 May 1368; was buried in , Alnwick, Northumberland, England. [Group Sheet] [Family Chart]