About the name Aileen
Aileen belongs to the Irish & Celtic tradition. Its roots are documented, even though its precise meaning is not recorded in the standard references — an honest gap we prefer to a confident guess. It travels in a few spellings: Eileen.
In the United States, Aileen first appears in Social Security records in 1880. It climbed to its best-ever rank of #289 in 1926, and in 2024 390 babies received the name — 37,293 in total since 1880. Those are the official counts, not estimates.