Kainin is a distinctive boys' name in United States, ranking #12938 in 2025 with 5 recorded births. This places Kainin in the bottom 7% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2012 with 9 births ranking #8505. In 2025, approximately 1 in every 341,615 boys born was named Kainin. STABLE Recent data shows the name is currently stable.