Isac is a distinctive boys' name in United States, ranking #2824 in 2015 with 42 recorded births. The name reached its all-time peak in 2006 with 148 births ranking #1147. Since 1996, the popularity has decreased by 32.3%. In 2015, approximately 1 in every 45,625 boys born was named Isac. RISING Recent data shows the name is currently rising.