Isaul is a distinctive boys' name in United States, ranking #12998 in 2010 with 5 recorded births. The name reached its all-time peak in 1997 with 8 births ranking #6849. Since 1996, the popularity has decreased by 28.6%. In 2010, approximately 1 in every 383,682 boys born was named Isaul. FALLING Recent data shows the name is currently falling.