Isaul is a distinctive boys' name in United States, ranking #7106 in 1998 with 8 recorded births. The name reached its all-time peak in 1997 with 8 births ranking #6849. Since 1996, the popularity has increased by 14.3%. In 1998, approximately 1 in every 238,915 boys born was named Isaul. FALLING Recent data shows the name is currently falling.