Isai is a distinctive boys' name in United States, ranking #963 in 1998 with 144 recorded births. This places Isai in the top 9% 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. In 1998, approximately 1 in every 13,273 boys born was named Isai. STABLE Recent data shows the name is currently stable.