Isac is a distinctive boys' name in United States, ranking #1647 in 2011 with 92 recorded births. The name reached its all-time peak in 2006 with 148 births ranking #1147. Since 1996, the popularity has increased by 48.4%. In 2011, approximately 1 in every 20,641 boys born was named Isac. RISING Recent data shows the name is currently rising.