Translating English to Japanese names

[XxKimagurexX]

I'm trying to come up with names for the type of dragons in my story I couldn't pick one from mythology so I decided to come up with my own. I need names that mean... large lizard, lizard of fire, lizard of ice, lizard of wind or air, lizard of water, and lizard of dust. I want the names to translate in to what they mean like how Hanako means "flower child". Sorry if I confused you

[wildwood]

Does it have to be Japanese?

How about.....

Megasaurus
Pyrosaurus
Glacialisaurus
Aurasaurus
Hydrosaurus
Pulvisaurus