Isaul is a distinctive boys' name in United States, ranking #11458 in 2007 with 6 recorded births. The name reached its all-time peak in 1997 with 8 births ranking #6849. Since 1996, the popularity has decreased by 14.3%. In 2007, approximately 1 in every 345,873 boys born was named Isaul. FALLING Recent data shows the name is currently falling.