Jac is a moderately popular boys' name in England & Wales, ranking #342 in 1998 with 69 recorded births. This places Jac in the top 9% of ranked UK boys' names for the year. Its actual usage is classified as Moderately Popular. The name reached its all-time peak in 2004 with 134 births ranking #246. Since 1996, the popularity has increased by 15.0%. In 1998, approximately 1 in every 4,500 boys born was named Jac. STABLE Recent data shows the name is currently stable.