Queen Rigrawst was one of the Queen consorts of King Brychan Brycheiniog the legendary 5th century king of Brycheiniog (Breconshire) in South Wales.
Born 468 AD, she was the daughter of Gwrtheyrn ap Gwidol the High King of Britain and Severa Ferch Mascsen, the daughter of Roman Emperor Magnus Maximus who visited Wales in 383AD and according to legend his wife Saint Elen. She is reputed to have been the mother of at least twenty children who themselves became saints.