Kacper is a distinctive boys' name in United States, ranking #3104 in 2001 with 29 recorded births. The name reached its all-time peak in 2007 with 88 births ranking #1714. Since 1996, the popularity has increased by 222.2%. In 2001, approximately 1 in every 66,994 boys born was named Kacper. STABLE Recent data shows the name is currently stable.