View Message

I agree with your reasoning; Felix is a bit unusual as far as being heard on an actual person, and I like the balance of a more usual middle name. I think Felix goes well with something fairly solid and I prefer it with a longer name. I'd suggest perhaps:

---

Felix Theodore (my personal favorite)
Felix Christopher
Felix Frederick (if you don't mind them beginning with the same letter)
Felix Anthony
Felix Samuel
Felix Benjamin
Felix Charles
Felix Emmanuel (if you're okay with the heavy religious connotation)
Felix Jeremiah
Felix Joseph