Isaah is a distinctive boys' name in United States, ranking #3225 in 2003 with 29 recorded births. The name reached its all-time peak in 2001 with 34 births ranking #2761. Since 1996, the popularity has increased by 70.6%. In 2003, approximately 1 in every 68,113 boys born was named Isaah. FALLING Recent data shows the name is currently falling.