Riku is a distinctive boys' name in United States, ranking #7537 in 2005 with 10 recorded births. This places Riku in the bottom 44% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2024 with 24 births ranking #4391. Since 1996, the popularity has increased by 25.0%. In 2005, approximately 1 in every 199,715 boys born was named Riku. FALLING Recent data shows the name is currently falling.