It's ok if it isn't overdone. then of course, there's the "accidental" pairings through marriage - like my brother & his wife, "Paul and Pauline". I used to work with a woman named- (I'm not kidding) - "Odell Odell" - her birth name plus her married last name! We ended up with two "S's" by accident - Sherman was already named when we got him, and it suits him so well, we couldn't change it. :)