Isaah is a distinctive boys' name in United States, ranking #2761 in 2001 with 34 recorded births. This places Isaah in the top 22% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2001 with 34 births ranking #2761. Since 1996, the popularity has increased by 100.0%. In 2001, approximately 1 in every 57,142 boys born was named Isaah. FALLING Recent data shows the name is currently falling.