Isaah is a distinctive boys' name in United States, ranking #12983 in 2012 with 5 recorded births. 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.