The Llysdinam estate and hamlet were created by the Venables family around their Llysdinam House, in Newbridge-on-Wye, then in Breconshire. The estate passed through the family, including: Richard Venables (1774-1858), archdeacon of Carmarthen and vicar of Clyro from 1811-1846; and Richard Lister Venables (1809–94), vicar of Clyro and Bettws Clyro. Following the marriage of Katherine Minna (b. 1870) and Sir Charles Dillwyn-Venables-Llewellyn, 2nd Baronet, in 1893, the estate was added to the Penllergare and Ynis-y-gerwn estates in Glamorgan, already held by the Dillwyn-Llewelyn family.
From 1911, Sir Charles erected a series of bird nest boxes on the estate, which today number around 1000. In the 1960s, Sir Michael Dillwyn-Venables-Llewelyn, the Lord Lieutenant of Radnorshire, formed both the educational Llysdinam Trust and the local county wildlife trust to preserve the estate.
- "Llysdinam Estate Records". National Library of Wales. Retrieved 2010-12-01.
- "Llysdinam Field Centre". Cardiff University. Retrieved 2010-12-01.
- "University outpost has failed to weather storm". Retrieved 2010-12-04.
- "November 2010-Wales diary of highlights". Met Office. 4 December 2010. Retrieved 2010-12-04.
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