Thomas de Clare, Lord of Thomond in Connaught, 2nd son of 5th Earl of Hertford and 2nd Earl of Gloucester. [Burke's Peerage]
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Thomas, governor of the city of London, 1st Edward I [1272-3], and was killed in battle in Ireland fourteen years after, leaving by Amy, his wife, dau. of Sir Maurice FitzMaurice, Gilbert, who d. s. p.; Richard, d. v. p., leaving a son, Thomas, who d. s. p.; Thomas, whose daus. and eventual co-heiresses were Margaret, wife of Bartholomew, 1st Lord Badlesmere, and Maud, wife of Robert, Lord Clifford, of Appleby. [Sir Bernard Burke, Dormant, Abeyant, Forfeited, and Extinct Peerages, Burke's Peerage, London, 1883, p. 119, Clare, Lords of Clare, Earls of Hertford, Earls of Gloucester]