Alphonso of Brienne [SEP] mother
Alphonso of Brienne
Alphonso of Brienne or Alphonse I de Brienne, called Alphonse d'Acre (c. 1228 – August 25, 1270) was the son of John of Brienne and Berengaria of León, born in Acre. He was the Grand Butler of France in 1258.
By his marriage (bef. 1250) to Marie, Countess of Eu he became Count of Eu. He was also Grand Chamberlain of France, and died in Tunis on the Seventh Crusade. He had at least two children by Marie:
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John I of Brienne, Count of Eu
John I of Brienne (died 12 June 1294) was the son of Alphonso of Brienne and Marie de Lusigan. His mother was the heiress of Eu, Seine-Maritime, and he succeeded his father as Count of Eu in 1270.
He married Beatrice, the daughter of Guy III, Count of Saint-Pol. They had:
1. John II of Brienne, Count of Eu
2. Isabelle (d. 1302/07), married John II of Dampierre