Likely a modern variation of Khalil, meaning friend
Kylil is a modern American invention, most likely created as a phonetic variant of the Arabic name Khalil. While it lacks a long historical lineage, it carries the inherited meaning of 'bosom friend' or 'companion' from its linguistic roots. It is frequently chosen by parents looking for a unique, rhythmic name with a familiar sound.
Less common today
Kylil isn't in the latest US Top 1000. It last peaked at #8,710 in 1995.
US births per 5-year period, 1990βpresent (SSA data).