Kelvin is a moderately popular boys' name in United States, ranking #367 in 1998 with 698 recorded births. This places Kelvin in the top 3% of ranked US boys' names for the year. Its actual usage is classified as Moderately Popular. The name reached its all-time peak in 1998 with 698 births ranking #367. In 1998, approximately 1 in every 2,738 boys born was named Kelvin. STABLE Recent data shows the name is currently stable.