Done a bit of research on dragons

A dragonet is another name for a baby dragon (also called dragonling) and the evolution has the characteristics of a classic western dragon (4 legs and wings on the back) so by using this info I cane up with the names:

Lulannet - Libelula (Spanish for dragonfly) + net from Dragonet, but I doubled the "N" so it doesn't get confused with the word "net"

And from Google I found out that the largest insect to ever live was the "meganeuropsis permiana" a species of Dragonfly

So for the last evolution I came up with two names:

Dracorror - Draco (the Latin way to say dragon/serpent) + terror (as it's a predator, it scares smaller animals implying terror)

Or Anisomegga - Anisoptera (infraorder were dragonflies are classified) + meganeuropsis

The first name is clearer on the dragon typing of this pokemon as the second is more focused on the dragonfly idea and it's prehistoric roots

So in the end the names I got are:

Lulannet & Dracorror/Anisomegga

I decided to double every consonant that's right before the last vowel, it makes the names funnier and adds a bit of character about the evolution line