If fire: inferno
Wyvern
The Wyvern is a highly sought-after massive flying dragon that can overpower most creatures it faces. The deadly Wyvern, which is only tamable by stealing and raising as a baby, can be found in four varieities — Fire, Ice, Lightning, and Poison — each of which have distinct attacks.

Name ideas for your Wyvern from ARK players.
Ice: icicle
If fire: blaze
Rusty for a fire dragon
Vail
Viserion if fire (Game of Thrones)
Lizard with wings and steroids
lightning zapdos
If lightning wyvern thunderwing
Fire: Phoenix
Ice: Shard
Poison: Ivy
Lightning: Strike
Fiery Fist O’ Pain
Lightning: Sheev
Lightning: Thor or Loki
Lightning:generator
Poison: Veleno, Venom, Toxic, Tranquillizer
Lightning: Static, Shock, Paralysis, Shocker.
If lightning call it Thor
Lightning:Skya
Viserion, Rhaegal and Drogon
If fire reshiram