Hawys Gadarn

Hawys Gadarn, Hawys the Strong (c. 1291–c. 1350), was the heiress of the Welsh marcher lordship of Powys, daughter of Owain ap Gruffudd. When her brother Gruffudd ab Owain died in 1309, she inherited the lordship and within weeks married John Charlton, a Shropshire knight.

Her uncle Gruffudd ap Gruffudd challenged her claim under Welsh custom, and in 1312 besieged the couple in Welshpool castle; the quarrel lasted until his death in 1332. Sixteenth-century antiquaries first recorded her epithet.