Jac is a moderately popular boys' name in England & Wales, ranking #444 in 2025 with 87 recorded births. The name reached its all-time peak in 2004 with 134 births ranking #246. Since 1996, the popularity has increased by 45.0%. In 2025, approximately 1 in every 3,126 boys born was named Jac. STABLE Recent data shows the name is currently stable.