Nest Ferch Rhys

Nest ferch Rhys (b. c. 1085 - d. before 1136) was the only legitimate daughter of Rhys ap Tewdwr, last King of Deheubarth, by his wife, Gwladys ferch Rhiwallon ap Cynfyn of Powys. She is sometimes known, incorrectly, as "Nesta" or "Princess Nesta".

Nest had two younger brothers, Gruffydd ap Rhys and Hywel, and several older illegitimate half-brothers and half-sisters. After their father's death in battle in 1093, "the kingdom of the Britons fell" and was overrun by Normans. Nest's brother Gruffydd was spirited into Ireland for safety; their brother Hywel was captured by Arnulf de Montgomery. The immediate fate of Nest and her mother is unknown. In any event, after she reached puberty, she came to the attention of the youngest son of William the Conqueror, Henry I of England, by whom she bore Henry FitzHenry (c. 1103–1158), one of his numerous illegitimate children.