Isai is a distinctive boys' name in United States, ranking #701 in 2007 with 333 recorded births. The name reached its all-time peak in 2007 with 333 births ranking #701. Since 1996, the popularity has increased by 123.5%. In 2007, approximately 1 in every 6,232 boys born was named Isai. STABLE Recent data shows the name is currently stable.