Isac is a distinctive boys' name in United States, ranking #1952 in 2012 with 73 recorded births. The name reached its all-time peak in 2006 with 148 births ranking #1147. Since 1996, the popularity has increased by 17.7%. In 2012, approximately 1 in every 25,981 boys born was named Isac. RISING Recent data shows the name is currently rising.