An Irish surname (derived from Kiely) meaning "good looking".
― Anonymous User 1/5/2011
2
This name comes from two Irish surnames: "Ó Cadhla" ("KAH-la") ("Descendant of the Graceful one") and "Ó Chaollaidhe" ("KAYL/KEEL-ee-ya") ("Descendant of the Thin one"). Interestingly, the latter comes from the masculine personal name "Caolach" (KAYL/KEEL-akh) ("Thin one"), sounding not unlike "Kayla". Frankly, I think that "Kiley" is a tired, trendy name, a mangling of the original names.