Isai is a distinctive boys' name in United States, ranking #872 in 2010 with 241 recorded births. The name reached its all-time peak in 2007 with 333 births ranking #701. Since 1996, the popularity has increased by 61.7%. In 2010, approximately 1 in every 7,960 boys born was named Isai. STABLE Recent data shows the name is currently stable.