Well, you could always go with the names of any of the races they looked at as inspiration for the dragonborn. I like the name dragonborn, but here are some alternatives:
- draconians
- draconics
- dragonspawn
- dragonblood
- drakespawn
- wyrmblood
- wyrmspawn
- wyrmish (though this could be confused with the formal dragon language "auld high wyrmish")
I dunno. That pretty much rounds out what I've got for ideas at the moment.