Unknown; likely a modern invented name or surname derivative.
Jex is a contemporary coinage with no established etymological root. It likely emerged as a creative variation of names like Jax or Rex, or as a transfer of the English surname Jex, which may have roots in the medieval name Jack or Geese.
Less common today
Jex isn't in the latest US Top 1000. It last peaked at #7,048 in 2018.
US births per 5-year period, 1990–present (SSA data).
Lead singer of the heavy metal band Jex Thoth
