What're the names of the Thunder and Poison Dragons?


In Fairy Tail, all the Dragons have names, like the Fire Dragon, Igneel. But I
don't remember anyone mentioning the names of the Thunder Dragon or the Poison
Dragon in the anime. Does someone know what their names are?




Laxus and Cobra are [**Second generation Dragon
Slayers**](http://fairytail.wikia.com/wiki/Dragon_Slayer#Second_Generation),
so they weren't taught Dragon Slayer Magic by a Dragon. Hence, Thunder and
Poison Dragons are never mentioned (moreover, they possibly do not exist at
all).

> Those from the second generation of Dragon Slayers have had Dragon Lacrima
> implanted into their bodies, granting them the ability to use Dragon Slayer
> Magic. Because they were not taught their abilities by a Dragon, they are
> considered artificial Dragon Slayers.

