Isac is a distinctive boys' name in United States, ranking #1373 in 2002 with 96 recorded births. The name reached its all-time peak in 2006 with 148 births ranking #1147. Since 1996, the popularity has increased by 54.8%. In 2002, approximately 1 in every 20,224 boys born was named Isac. RISING Recent data shows the name is currently rising.