Joan Plantagenet of England was born April 1272 in Acre, Israel to Edward I of England (1239-1307) and Eleanor of Castile (1241-1290) and died 7 April 1307 Clare Castle, Clare, Suffolk, England, United Kingdom of unspecified causes. She married Gilbert de Clare, 7th Earl of Gloucester (1243-1295) 1 April 1290 JL in Westminster Abbey, England, United Kingdom. She married Ralph de Monthermer, 1st Baron Monthermer (1270-1325) January 1297 JL . Alfred the Great (849-899)/s, Charlemagne (747-814)/s, Henry II of England (1133-1189)/s, Hugh Capet (c940-996)/s, William I of England (1027-1087)/s, Rollo of Normandy (860-932)/s.
|Offspring of Joan of Acre and Ralph de Monthermer, 1st Baron Monthermer (1270-1325)|
|Mary de Monthermer (1297-c1371)|
|Joan de Monthermer (1299)|
|Thomas de Monthermer, 2nd Baron Monthermer (1301-1340)||4 October 1301||24 June 1340||Margaret Teyes|
|Edward de Monthermer (1304-1339)|