The 1st baronet was a landowner with a 12,000-acre (4,900 ha) estate in North Wales, UK, most of which was inherited from his father, Owen Jones Ellis-Nanney.
[6] The family of Gwynfryn,[7] Llanystumdwy, are descendants of Collwyn ap Tangno [cy] the 11th century Lord of Eifionydd, progenitor of the fifth of Fifteen Tribes of Wales.
[12] The family are also descended from the Irish Norman knight Roger de Montgomery who fought at the Battle of Hastings in 1066, and from Osbwrn Wyddel of the House of Corsygedol.
Richard married Elizabeth, the daughter of Baron Lewis Owen, Vice-Chamberlain of North Wales, of Cwrt Plas Dolgellau.
[21][22][14] Aforementioned Hugh John Ellis-Nanney, Baronet, was the only son of Owen Jones Ellis Nanney of Bryn Hir, Criccieth.
She was the eldest daughter and heiress of Hugh Jones of Hengwrtucha, Llanfachreth in Merionethshire, who was a business partner of the Diphwys Casson quarry.
During 1845, Hugh Jones and Owen Ellis-Nanney had together purchased Plas Hen (Talhenbont Hall) from the Mostyn baronets for £50,000 (equivalent to £6,200,000 in 2023).
[14][18][22] This marriage is the first of the inter-marriage between the families of Gwynfryn and Cefndeuddwr:[7][31] The heir would have been Owen Gerald Ellis-Nanney, born 1879, he died before the baronetcy in 1887.