bloodlust (if red) or apex
Rex

Name ideas for your Rex from ARK players.
Rhonda
Omega
Terminater
Rexstar
Chopper (Skylander)
Flatline
RAAAAAAAAWR.
Debra. Call it debra
Tearex
robbie the rex
Tyrantrum (From Pokémon)
Tek Rex has to be Grimlock...
Toilet snatcher
Tex the Rex
Kronos if male.
Jurass kicked
Darth Tyrannis (count dooku’s Sith name)
Rex Mex
Omega 09 (Jurassic world the game)