Isaah is a distinctive boys' name in United States, ranking #3203 in 1997 with 23 recorded births. The name reached its all-time peak in 2001 with 34 births ranking #2761. Since 1996, the popularity has increased by 35.3%. In 1997, approximately 1 in every 81,960 boys born was named Isaah. FALLING Recent data shows the name is currently falling.