John V de Vendôme

John V de Vendôme (c. 1260–1315) of the House of Montoire inherited the county of Vendôme from his father Bouchard V in 1271. In 1282 he campaigned in Apulia in the service of Charles I of Anjou.

Through his marriage to Eleanor of Montfort, daughter of the lord of Castres, he inherited Castres in 1300 along with the county of Squillace, and spent most of the rest of his life at Castres. He split the Vendômois into Upper and Lower Vendôme, making Montoire chief town of the latter, and his son Bouchard VI succeeded him.