Isac is a distinctive boys' name in United States, ranking #1503 in 2009 with 111 recorded births. The name reached its all-time peak in 2006 with 148 births ranking #1147. Since 1996, the popularity has increased by 79.0%. In 2009, approximately 1 in every 17,868 boys born was named Isac. RISING Recent data shows the name is currently rising.