There is some disagreement about the origin of this name. Some say it was originally a short form of Eibhilin (often anglicized Eileen in Ireland and Aileen in Scotland), which may in turn be either a form of the Germanic Aveline, or a form of the Greek Helen, or come from the native Gaelic Aoibhlinn meaning 'radiance.'

Or, it may have developed on its own as a form of Helen, influenced by the name Ellie. Whatever its origin, it's now taken to be a Scottish form of Helen.
See Also: Ailie

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