Fonds GB 0210 TRWERN - Trewern Estate Records,

The family derives from a mixed origin, combining the Joneses of Penrallt, Cardiganshire, the Scottish family of Schaw, the Protheroes of Dolwilym, Carmarthenshire, and the Beynons of Trewern, Pembrokeshire.

The Protheroe family resided at Dolwilym from around the turn of the 17th century when Rhydderch ap John, living in 1600, bought Dolwilym. The estate descended in the male line until Evan Protheroe (1715-1795), who had married Elizabeth, daughter of David Jones of Penyrallt, died without issue. He bequeathed the estate to his brother-in-law, Dr Evan Jones, stipulating that he should take the surname Protheroe.

Evan Jones succeeded to the estate on the death of his sister, Elizabeth in 1813. He married Emma, widow of David Garrick, and when he died in 1841 the estate passed to his only daughter Emma Hart Protheroe. She married William Garrick Bridges Schaw (d. 1856), who took on the additional surname of Protheroe after their marriage in 1819. Their son, Edward Schaw Protheroe (d. 1906) married Ellen Augusta Cecilia Beynon, daughter of John Thomas Beynon, of Trewern.

Ellen's great-grandfather was Thomas Beynon of Cethin, who had inherited Trewern in right of his wife, Mary Thomas, heiress of Trewern and daughter of John Thomas (d. 1730). The estate had passed down the male line until Ellen Augusta Cecilia Beynon.

Edward and Ellen's heir was Major Godfrey Evan Protheroe of Dolwilym and Trewern, who took the additional surname of Beynon in 1899.