Arms of John Ap Adam: Argent, on a cross gules, five mullets or.
John Ap Adam III, 1st Baron Ap-Adam son of Reginald Ap Adam (1242-1268 and Joan De Knoxville (1246-1311) (died May 1311) was created baron by writ in 1299.
John Ap Adam married Elizabeth de Gurnay, the daughter of John de Gurnay Baron of Beverstone, and Olivia Lovel. They had at least one son, Sir Thomas Ap-Adam, who left children.
This Thomas was never summoned to parliament; thus the barony became dormant.
References
Burke, Sir Bernard. "Ap-Adam, Barons de Ap-Adam." A Genealogical History of the Dormant, Abeyant, Forfeited, and Extinct Peerages, of the British Empire. London: William Clowes and Sons, Ltd., 1962. p. 8.
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