What does the name Callen mean? The meaning of the name Callen is Slender, Thin. The origin of the name Callen is Irish. This is the culture in which the name originated, or in the case of a word, the language.
Alternate spellings: Callin
People who like the name Callen also like: Declan
, Lachlan Ava
Name Notes: From the Gaelic name CAOLÁN.