John married Elizabeth, Baroness Clare De Clare on 30 Sep 1308. Elizabeth, (daughter of Gilbert "the-Red-Earl" De Clare, [Earl of Glouces and Joan "of Acre" England, [COUNTESS GLOUCE) was born on 16 Sep 1295 in Tewkesbury, GLOUCESTER, England; was christened in (65-1360); died on 4 Nov 1360; was buried in St Mary, Aldgate, London, Middlesex. [Group Sheet] [Family Chart]