Kacper is a distinctive boys' name in United States, ranking #3724 in 2002 with 23 recorded births. The name reached its all-time peak in 2007 with 88 births ranking #1714. Since 1996, the popularity has increased by 155.6%. In 2002, approximately 1 in every 84,412 boys born was named Kacper. STABLE Recent data shows the name is currently stable.