Aileen \a(i)-leen\ as a girl's name is pronounced eye-LEEN. It is of Norman origin. Scottish variant of Eileen; also variant of Evelyn and Helen.
Aileen has 41 variant forms: Aila, Ailee, Aileene, Ailene, Ailey, Ailli, Ailie, Aillin, Ailyn, Aleen, Alene, Aline, Alleen, Allene, Alline, Eileen, Eleen, Elleen, Ellene, Ileana, Ileane, Ileanna, Ileen, Ileene, Ilene, Iliana, Iliane, Illianna, Illeanne, Illene, Leana, Leanah, Leanna, Leannah, Lena, Lenah, Liana, Lianna, Liannah, Lina and Linah.
For more information, see also the related name Eibhlin.