Kasius is a distinctive boys' name in United States, ranking #11345 in 2025 with 6 recorded births. This places Kasius in the bottom 19% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2023 with 9 births ranking #8581. In 2025, approximately 1 in every 284,679 boys born was named Kasius. FALLING Recent data shows the name is currently falling.