Definition of "Aileen"

Though her name was Aileen the minister drafted in continually referred to her as Eileen, but neither Louise nor the ramshackle bunch of people who regarded themselves as her mother's friends had bothered to correct him. Louise liked the way 'Eileen' made her mother seem like someone else altogether, a stranger and not her mother.

2006, Kate Atkinson, One Good Turn, Black Swan, published 2007, page age