I prefer
Frederick to
Theodore, but
Teddy to
Freddie.
Frederick gives me a very strong dignified vibe, but with a fun side. I really dislike
Freddie though, enough that it makes we want to avoid
Frederick.
Theodore actually gives me quite a silly, joking feel, with
Teddy bringing a sweetness to the picture.
Frederick Ambrose Arthur is a fantastic combo. Great flow and some excellent names. I'd love to see what you do come up with for
Theodore.