Thomas came from a family that was for many years seated at Wenvoe. The original male line was named (ap) Harpwaye, of Tresimont. Harpwaye of Tresimont may be a variation of (ap) Harpway of Tresimwn/Tre Simon/Bonvilston.[4][5] The Harpwayes were an old family of Herefordshire.[6] The family adopted the name of Thomas, as a result of a marriage with Catherine, daughter and sole heir of Thomas ap Thomas, of Wenvoe Castle.[7] Edmund Thomas was the only son of William Thomas and Jane Stradling, daughter of Sir John Stradling, 1st Baronet. Edmund Thomas married firstly Elizabeth Morgan, daughter of Sir Lewis Morgan of Ruperra Castle and sister of Thomas Morgan. He married secondly Mary Lewis, daughter of Sir Thomas Lewis of Penmark Place at Wenvoe on 1 August 1671. Their son and heir William Thomas married Mary, the daughter of Philip, Lord Wharton[8] with whom he had two children, Edmund and Anna. On William Thomas's death in 1677, his wife Mary inherited the estates of Wenvoe and Ruperra. Their two children, both died prematurely and on Mary's death, in 1699, the estates passed to her sister-in-law Elizabeth, Edmund Thomas's elder sister whose first marriage was to Edmund Ludlow.[9] On Ludlow'a death, Wenvoe and Ruperra were returned to the Thomas family when Elizabeth married secondly, her distant cousin Sir John Thomas, 1st Baronet.[10]
Collins, Arthur (1741). The English Baronetage: Containing a Genealogical and Historical Account of All the English Baronets, Now Existing: Their Descents, Marriages, and Issues; Memorable Actions, Both in War, and Peace; Religious and Charitable Donations; Deaths, Places of Burial and Monumental Iiscriptions [sic]. Vol. 4. Tho. Wotton. p. 383.
Jenkins, Philip (2002). The Making of a Ruling Class: The Glamorgan Gentry 1640–1790. Cambridge University Press. pp. 112. ISBN978-0-521-52194-9.
Noble, Mark (1787). Memoirs of the protectoral-house of Cromwell;: deduced from an early period, and continued down to the present time ... collected chiefly from original papers and records ... together with an appendix ... Embellished with elegant engravings. Vol. I. G. G. J. and J. Robinson. p. 422.
Williams, William Retlaw (1895). The parliamentary history of the principality of Wales, from the earliesr times to the present day, 1541–1895 ... Brecknock: Priv. Print. for the author by E. Davis and Bell. pp. 97, 98.
Betham, William. The Baronetage of England: Or The History of the English Baronets, and Such Baronets of Scotland, as are of English Families; with Genealogical Tables, and Engravings of Their Coats of Arms, Burrell and Bransby, 1803 p . 110 "Thomas of Wenvoe, Glamorganshire, Created Baronet Dec. 4 1694."
Huygens , Lodewijck , et al.The English journal, 1651–1652, Issue 1 of Publications of the Sir Thomas Browne Institute. Archive, 1982. ISBN90-04-06858-9, ISBN978-90-04-06858-2. p. 126 A description of Wenvoe Castle as it appeared in 1652.