Isai is a distinctive boys' name in United States, ranking #881 in 2011 with 237 recorded births. The name reached its all-time peak in 2007 with 333 births ranking #701. Since 1996, the popularity has increased by 59.1%. In 2011, approximately 1 in every 8,013 boys born was named Isai. STABLE Recent data shows the name is currently stable.