Isaih is a distinctive boys' name in United States, ranking #10078 in 2025 with 7 recorded births. This places Isaih in the bottom 28% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 1999 with 74 births ranking #1521. Since 1996, the popularity has decreased by 84.4%. In 2025, approximately 1 in every 244,011 boys born was named Isaih. FALLING Recent data shows the name is currently falling.