Jac is a distinctive boys' name in United States, ranking #10561 in 1999 with 5 recorded births. This places Jac in the bottom 9% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2022 with 18 births ranking #5289. In 1999, approximately 1 in every 384,017 boys born was named Jac. FALLING Recent data shows the name is currently falling.