Riku is a distinctive boys' name in United States, ranking #4822 in 2006 with 19 recorded births. The name reached its all-time peak in 2024 with 24 births ranking #4391. Since 1996, the popularity has increased by 137.5%. In 2006, approximately 1 in every 108,164 boys born was named Riku. FALLING Recent data shows the name is currently falling.