Ashlyn is usually explained as an American blend of Ashley and Lynn, so "ash tree meadow" plus the Welsh "lake"; some also link it to the Irish Aisling, "dream" or "vision". It rode the Ashley wave of the 1980s and 1990s and peaked when the -lyn names were at their height. Ashlyn reached number 127 in 2005, has fallen steadily since and ranks number 972 among girls' names in 2025.