Kaius is a distinctive boys' name in United States, ranking #1118 in 2023 with 189 recorded births. This places Kaius in the top 8% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2025 with 216 births ranking #1029. In 2023, approximately 1 in every 9,040 boys born was named Kaius. RISING Recent data shows the name is currently rising.