Narrow water or river man
Kelvyn is a modern spelling variant of Kelvin. It originates from the name of the River Kelvin in Scotland, which flows into the River Clyde, and eventually became used as a surname and given name.
Less common today
Kelvyn isn't in the latest US Top 1000. It last peaked at #5,046 in 1998.
Ghanaian Afrobeats singer
German-Nigerian rapper and songwriter
US births per 5-year period, 1990βpresent (SSA data).