Kainalu is a distinctive boys' name in United States, ranking #5997 in 2025 with 15 recorded births. The name reached its all-time peak in 2003 with 32 births ranking #3022. Since 1996, the popularity has decreased by 11.8%. In 2025, approximately 1 in every 113,872 boys born was named Kainalu. FALLING Recent data shows the name is currently falling.