Ever since I heard Ron Reagan say to someone on MSNBC that it's Ron P. Reagan, I always refer to him as Ron Pea, as in a small, round, common veggie, totally useless as a single unit. Peas are one of the less nutritious vegetables, by the way.
My husband made the mistake of calling him Ronald Reagan Jr. once in my presence.
We have house rules about that kind of thing. That collectin of dna that purports to be human is referred to only as Prescot in my house, as he is worthy of neither his first, nor his last name.