On 3 Jul 1329 Joan married John d’Arcy, son of Sir Roger d’Arcy (ca 1253-bef 12 May 1284) & Isabel d’Aton, in Maynooth, Kildare, Ireland. Born ca 1280/1285. John died on 30 May 1347 in Knaith, Lincolnshire. Buried in Gisborough Priory, Yorkshire.
John, first Baron Darcy of Knaith, Justiciar of Ireland, Chamberlain to the King.