Alfonso of Brienne, called Alphonse d'Acre (c. 1220 – 14 September 1270), was the son of John of Brienne and Berengaria of León,[1] born in Acre.
Alfonso took part in the Seventh Crusade (1248) as a squire.[2] By his marriage (before 1250) to Marie, Countess of Eu he became Count of Eu.[1] He was also Grand Chamberlain of France. He died on 14 September 1270 in Tunis on the Eighth Crusade in the same epidemic that claimed King Louis IX.[3]
He had at least two children by Marie:
- John I of Brienne, Count of Eu[1]
- Blanche (d. 1338), Abbess of Maubuisson[4]
- ^ a b c Pollock 2015, p. 145.
- ^ Perry 2018, p. 79.
- ^ Perry 2018, pp. 107–108.
- ^ Perry 2018, p. xxiii.