The name Zac is a boy's name of Hebrew origin meaning "the Lord has remembered". Zac and is often added to lists like Cool Baby Names That Start With Z and discussed in our forums with posts like ""Don't call me ___, I go by ___"".
From the experts:
A popular nickname that, over the past few decades, has acquired enough standing to work on its own, a la earlier equivalents such as Jack and Max; an alternative to Zach/Zack. Actor/singer Zac Efron--born Zachary--is an attractive current bearer.