Name?

My husband and I love the name Finn for a boy, but I have a weird thing about having a nickname that can be derived from the name. For example, we currently have a son named Theo, nn he has are Teddy and Ted. We can’t come up with a nickname from Finn. So we’ve thought about using Finn as a nickname and using Finnegan (spelling TBD) as the given name. We both like it, but I’m worried about teasing due to the nursery rhyme...

Can any of you come up with either a nickname from Finn or if not, do you think he’d be made fun of with the name Finnegan?

We looked into alternatives, and all we can find are Finley/Finnley, or names like Griffin. My husband thinks Finley is too feminine and I don’t personally like Griffin. But if you can come up with something else, I’d definitely run it past him!