Isaah is a distinctive boys' name in United States, ranking #12983 in 2012 with 5 recorded births. This places Isaah in the bottom 9% 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 decreased by 70.6%. In 2012, approximately 1 in every 379,325 boys born was named Isaah. FALLING Recent data shows the name is currently falling.