Margaret Hanmer
Margaret Hanmer (c. 1370 – c. 1420), sometimes known by her Welsh name of Marred ferch Dafydd, was the wife of Owain Glyndŵr. Although some modern histories have accorded Margaret the title "Princess of Wales", there is no contemporary record that Margaret used either that title, or her husband's earlier title of Prince of Powys; it is likely Margaret would have used neither. "Princess of Wales", an English honorific given to the wife of the English prince of Wales, was first used by Joan of Kent. Only one wife of a Welsh prince is known to have used the title: Eleanor de Montfort, wife of Llywelyn ap Gruffudd, the last Prince of Wales.
Early life and marriage
Nothing is known of Margaret's early life, not even the precise date of her marriage. She was the daughter of Sir David Hanmer and his wife Angharad ferch Llywelyn Ddu, and very likely raised in a Welsh household. Her father was a law professor of Owain Glyndwr; it is not known when she married Owain, although it may have taken place in 1383 in the church of St Chad's in Hanmer. The number of children she bore, and the dates of their births, are likewise uncertain.