Isac is a distinctive boys' name in United States, ranking #1886 in 2013 with 75 recorded births. The name reached its all-time peak in 2006 with 148 births ranking #1147. Since 1996, the popularity has increased by 21.0%. In 2013, approximately 1 in every 25,217 boys born was named Isac. RISING Recent data shows the name is currently rising.