Other than the fact that they are both reptillian(which most Spyro villains are) and both users of magic(which most Spyro villains also are), there is little to support your theory that they are related.
yeah, i mean, Spyro is a dragon, he breaths fire, and theres also Flame who is a dragon, and he breaths fire, just like *shivers* Ember....and LOADS more dragons.....and Spyros an orphan *crys* "!AWW BLESS!"