- Born: Cir 990
- Marriage (1): Baldwin III of Boulogne
- Died: Cir 1045
Another name for Aleida was Adelina.
Aleina of Holland was a daughter of Arnulf, Count of Holland and Lutgardis of Luxemburg. She first married to Baldwin II, Count of Boulogne (with whom she had Eustace I of Boulogne) and then to Enguerrand I of Ponthieu.
Aleida married Baldwin III of Boulogne, son of Arnulf III of Boulogne and Unknown. (Baldwin III of Boulogne was born about 976 in Boulogne, Upper Lorraine, France and died circa 1033 46.)