Modern American creation, likely a blend of Ke- and Moni.
Keymoni is a contemporary American name without a single established etymological root. It is likely a creative combination of the popular prefix 'Ke-' with the name 'Moni' or 'Monee', possibly influenced by the name Kehlani or the word money.
Less common today
Keymoni isn't in the latest US Top 1000. It last peaked at #8,719 in 2012.
US births per 5-year period, 1990βpresent (SSA data).