Quick answer
Jax is a boy name.
Meaning and history
Short form of Jackson. It appeared in the video game Mortal Kombat II in 1993. It first registered as a given name in the United States in 1995 (when it was used only five times) but steadily grew in popularity for two decades, probably inspired by similar names like Max and Dax and helped by a character of this name on the American television series Sons of Anarchy (2008-2014).
Notes and context
Usage: english