Alphonso of Brienne

Alphonso of Brienne or Alphonse I de Brienne, called Alphonse d'Acre (c. 1225 – August 25, 1270) was the son of John of Brienne and Berengaria of Leon, born in Acre. He was the Grand Butler of France in 1258.

By his marriage (bef. 1250) to Marie of Lusignan, Countess d'Eu (c. 1223-1260) he became Count of Eu. He was also Grand Chamberlain of France, and died in Tunis on the Seventh Crusade. He had two children by Marie:

• John I of Brienne, Count of Eu (d. 1294)
• Blanche (d. bef. 1338), Abbess of Maubuisson