Jac is a moderately popular boys' name in England & Wales, ranking #246 in 2004 with 134 recorded births. This places Jac in the top 5% 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 123.3%. In 2004, approximately 1 in every 2,302 boys born was named Jac. STABLE Recent data shows the name is currently stable.