Rejoicing; or a variation of Cayman
Kayman is likely a modern phonetic variant of the name Cayman, referring to the Caribbean islands or the reptile. It may also be interpreted as a combination of the name Kay, meaning 'rejoice', and the suffix 'man'.
Less common today
Kayman isn't in the latest US Top 1000. It last peaked at #6,254 in 1998.
US births per 5-year period, 1990βpresent (SSA data).