Thomas Butler, 1st Baron Dunboyne was the son of Theobald Butler and Joan fitz John. He married Synolda le Petit, daughter of William le Petit. He died on 9 October 1329, killed in action, by the MacGheoghan.
He was also known as Thomas le Botiller.1 In 1324 he was called to the Irish Parliament (as were intermittently his descendants in the succeeding two centuries before the creation of the Barony of Dunboyne as a lordship of Parl by patent 1541), whereby what in England might have been regarded as a feudal lordship beca.1 He was created 1st Baron Dunboyne [Ireland] in 1324, by prescription. He fought in the Battle of Ardnurcher on 9 October 1329. [ie. 10 August 1329]
