Joan Saint Owen 1
- Born: Abt 1260, Of, Winchester, Hampshire, England
- Marriage: Richard Plantagenet Abt 1279, Of, Cornwall, Cornwall, England
Ancestral File Number: 9NQF-99.
Joan married Richard Plantagenet, son of Richard Prince Of England and Sancha Countess Of Provence, about 1279 in Of, Cornwall, Cornwall, England. (Richard Plantagenet was born about 1252 in Of, Berkhamstead, Hertfordshire, England, died in 1296 in , Berwick, Northumberland, England and was buried in , Hayles, Gloucestershire, England.)