Ailen is a name with two separate sources: in the Mapuche language of Chile and Argentina, Ailén means "ember" or "glowing coal", while in English it is also read as a spelling of Aileen, the Irish form of Helen, "bright" or "shining". The Mapuche reading is the one most Latin American families intend. Ailen has risen from number 9173 in 2000 to a peak of number 1907 in 2022 and ranks number 2154 in 2025.