Jac is a moderately popular boys' name in England & Wales, ranking #363 in 2010 with 113 recorded births. This places Jac in the top 6% 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 88.3%. In 2010, approximately 1 in every 3,064 boys born was named Jac. STABLE Recent data shows the name is currently stable.