Jax is a moderately popular boys' name in United States, ranking #243 in 2021 with 1,454 recorded births. The name reached its all-time peak in 2015 with 1,864 births ranking #215. Since 1996, the popularity has increased by 6,509.1%. In 2021, approximately 1 in every 1,202 boys born was named Jax. FALLING Recent data shows the name is currently falling.