Isai is a distinctive boys' name in United States, ranking #812 in 2001 with 206 recorded births. The name reached its all-time peak in 2007 with 333 births ranking #701. Since 1996, the popularity has increased by 38.3%. In 2001, approximately 1 in every 9,431 boys born was named Isai. STABLE Recent data shows the name is currently stable.