Isai is a distinctive boys' name in United States, ranking #1026 in 2013 with 190 recorded births. The name reached its all-time peak in 2007 with 333 births ranking #701. Since 1996, the popularity has increased by 27.5%. In 2013, approximately 1 in every 9,954 boys born was named Isai. STABLE Recent data shows the name is currently stable.