Keywords: ArmsOfWilliam Courtenay10th EarlOfDevonTivertonChurch.jpg Arms of William Courtenay 1st Earl of Devon d 1511 above the south porch of Tiverton Church The arms are Courtenay impaling the arms of his wife Katherine of York Quarterly 1st Arms of Edward IV; 2nd 3rd Or a cross gules de Burgh 4th Mortimer modified from File Elizabeth of York Arms svg wikicommons 2012-08 Lobsterthermidor Courtenay arms William Courtenay 1st Earl of Devon Catherine of York De Redvers arms Coats of arms of King Edward IV of England |