Kasimir is a distinctive boys' name in United States, ranking #10246 in 2003 with 6 recorded births. This places Kasimir in the bottom 20% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2021 with 9 births ranking #8508. In 2003, approximately 1 in every 329,212 boys born was named Kasimir. FALLING Recent data shows the name is currently falling.