Isaah is a distinctive boys' name in United States, ranking #4112 in 2005 with 22 recorded births. This places Isaah in the top 31% 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 29.4%. In 2005, approximately 1 in every 90,779 boys born was named Isaah. FALLING Recent data shows the name is currently falling.