Isai is a distinctive boys' name in United States, ranking #847 in 1999 with 179 recorded births. This places Isai in the top 7% of ranked US boys' names for the year. Its actual usage is classified as Uncommon. The name reached its all-time peak in 2007 with 333 births ranking #701. Since 1996, the popularity has increased by 20.1%. In 1999, approximately 1 in every 10,727 boys born was named Isai. STABLE Recent data shows the name is currently stable.