Alduin (or Hildouin) I (died 27 March 916) was the Count of Angoulême from 886.
He was the son of Wulgrin I, Count of Angoulême, whom he succeeded on 3 May 886. Like his father, he was charged with defending parts of Aquitaine against the Viking invaders.
Alduin's wife is unknown, but they had a son, William II of Angoulême, (William Taillefer I; 926–945) Count of Angoulême.
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