Isayah is a distinctive boys' name in United States, ranking #2446 in 2003 with 43 recorded births. The name reached its all-time peak in 2007 with 46 births ranking #2663. Since 1996, the popularity has increased by 330.0%. In 2003, approximately 1 in every 45,936 boys born was named Isayah. FALLING Recent data shows the name is currently falling.