The name Aileen is an Irish baby name. In Irish the meaning of the name Aileen is: Light. From the name Eibhlin, derived from Evelyn or Evelina. Light. American Meaning: The name Aileen is an American baby name. In American the meaning of the name Aileen is: Light.From the name Eibhlin, derived from Evelyn or Evelina.n Scottish the meaning of the name Aileen is: From the green meadow, a. Also a Scottish variant of the Irish Eileen. SoulUrge Number: 2. Expression Number: 1. People with this name have a deep inner desire for love and companionship, and want to work with others to achieve peace and harmony.