Kasimir is a distinctive boys' name in United States, ranking #8508 in 2021 with 9 recorded births. This places Kasimir in the bottom 40% 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 2021, approximately 1 in every 194,249 boys born was named Kasimir. FALLING Recent data shows the name is currently falling.