Isaul is a distinctive boys' name in United States, ranking #8652 in 2001 with 7 recorded births. This places Isaul in the bottom 30% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 1997 with 8 births ranking #6849. In 2001, approximately 1 in every 277,547 boys born was named Isaul. FALLING Recent data shows the name is currently falling.