name debate with SO

Marissa
if we have a boy, his name will be Edward Peter (the fourth). I don't disagree with naming him after the family but we're butting heads on the nickname. 
Ed is babies grandpa
Eddie is my fiancé 
Edward is too formal in my opinion. 
I want to call him Peter because it's different but my fiancé thinks "Eddy" but I don't want two Eddies in my house, that's gonna be confusing 😂
I want to pull the "I'm carrying the child I can name him" card especially since I'm letting him pass his name on but I don't know how he'll react to that lol. 
Opinions, ladies?

Glow Resources

Let’s Glow

Glow is here for you on your path to pregnancy

Glow helps you navigate your fertility journey with smart tools, personalized insights, and guidance from medical experts who understand what matters most.

25+ million

Users

4.8 stars

200k+ app ratings

20+

Medical advisors