William married Catherine GRANDISON about 1322. Catherine (daughter of 1st Baron Grandison William de GRANDISON and Sibylla de TREGOZ) was born about 1304; died on 23 Nov 1349. [Group Sheet] [Family Chart]
Family/Spouse: 2nd Earl of March, 4th Baron Mortimer Roger MORTIMER. Roger (son of Sir Edmund MORTIMER and Elizabeth de BADLESMERE) was born on 11 Nov 1328; died on 26 Feb 1360 in Rouvray, Burgundy, France. [Group Sheet] [Family Chart]
Edmund married Phillipa PLANTAGANET, of Clarence in 1368. Phillipa (daughter of Duke of Clarence, Lionel of Antwerp GAUNT, K.G. and Lady Elizabeth DE BURGH) was born in 1355; died in 1382. [Group Sheet] [Family Chart]
Family/Spouse: Lady, Eleanor HOLLAND. Eleanor died in 1405. [Group Sheet] [Family Chart]