Isac is a distinctive boys' name in United States, ranking #1151 in 2001 with 120 recorded births. The name reached its all-time peak in 2006 with 148 births ranking #1147. Since 1996, the popularity has increased by 93.5%. In 2001, approximately 1 in every 16,190 boys born was named Isac. RISING Recent data shows the name is currently rising.