Iassac is a distinctive boys' name in United States, ranking #11546 in 2003 with 5 recorded births. This places Iassac in the bottom 10% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2003 with 5 births ranking #11546. In 2003, approximately 1 in every 395,054 boys born was named Iassac. STABLE Recent data shows the name is currently stable.