Isaah is a distinctive boys' name in United States, ranking #4050 in 2007 with 25 recorded births. The name reached its all-time peak in 2001 with 34 births ranking #2761. Since 1996, the popularity has increased by 47.1%. In 2007, approximately 1 in every 83,009 boys born was named Isaah. FALLING Recent data shows the name is currently falling.