Isai is a distinctive boys' name in United States, ranking #1031 in 2017 with 195 recorded births. The name reached its all-time peak in 2007 with 333 births ranking #701. Since 1996, the popularity has increased by 30.9%. In 2017, approximately 1 in every 9,489 boys born was named Isai. STABLE Recent data shows the name is currently stable.