Isais is a distinctive boys' name in United States, ranking #7105 in 1998 with 8 recorded births. This places Isais in the bottom 37% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2009 with 14 births ranking #6228. Since 1996, the popularity has increased by 60.0%. In 1998, approximately 1 in every 238,915 boys born was named Isais. FALLING Recent data shows the name is currently falling.