Unknown; likely a modern invented name
Keymon is a contemporary American name with no established etymological history. It is likely a creative blend of the prefix 'Key-' with the suffix '-mon', or a phonetic variation of names like Quemon or Kemon. Due to its modern and rare usage, it lacks a traditional meaning.
Less common today
Keymon isn't in the latest US Top 1000. It last peaked at #5,368 in 2011.
US births per 5-year period, 1990βpresent (SSA data).