Isai is a distinctive boys' name in United States, ranking #1010 in 2019 with 207 recorded births. The name reached its all-time peak in 2007 with 333 births ranking #701. Since 1996, the popularity has increased by 38.9%. In 2019, approximately 1 in every 8,664 boys born was named Isai. STABLE Recent data shows the name is currently stable.