Isai is a distinctive boys' name in United States, ranking #1031 in 2015 with 197 recorded births. This places Isai in the top 7% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2007 with 333 births ranking #701. Since 1996, the popularity has increased by 32.2%. In 2015, approximately 1 in every 9,727 boys born was named Isai. STABLE Recent data shows the name is currently stable.