Isack is a distinctive boys' name in United States, ranking #7592 in 1997 with 7 recorded births. This places Isack 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 2004 with 13 births ranking #5932. In 1997, approximately 1 in every 269,299 boys born was named Isack. STABLE Recent data shows the name is currently stable.