Klein is a distinctive boys' name in United States, ranking #5066 in 2019 with 19 recorded births. This places Klein in the top 36% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2013 with 25 births ranking #4017. Since 1996, the popularity has increased by 171.4%. In 2019, approximately 1 in every 94,387 boys born was named Klein. STABLE Recent data shows the name is currently stable.