Isayah is a distinctive boys' name in United States, ranking #9227 in 2025 with 8 recorded births. This places Isayah in the bottom 34% 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 46 births ranking #2663. Since 1996, the popularity has decreased by 20.0%. In 2025, approximately 1 in every 213,510 boys born was named Isayah. FALLING Recent data shows the name is currently falling.