I know a Cody (30 year old guy) and a Kodee (8 year old girl), and I find the former grown up and masculine, and the latter childish and girly. It’s the people who make the name, not the name that makes the people.
Could be worse—my aunt Marie’s other given name is Carmela.
I didn’t see anything about them being twins, or even related.
Who would give twins the same name?
North Dakota and South Dakota?
I know a guy named Cody who runs with the cowboy theme. He’s a big guy, and the boots and hat and string tie work for him. He’s also about 60-ish, and he looks like he could kick anyone’s ass with one hand tied behind his back.
There’s a family I know with two daughters, Dystyny and Triniti… those are stripper names if I ever saw one.
No, they’re not twins. They’re two unrelated children, the kids of friends. The girl is about five, and the little boy is about two.
Although North Dakota and South Dakota would be awesome names for twins. 
My middle name is Marie. It was my grandmother’s first name. I’ve always thought it was a beautiful name.
However, it does seem that one third of U.S. women seem to have that as our middle name. Another third seem to bear the middle name of “Ann” or “Anne”.
and then you get my mother, Ann Marie. 
I always thought Lee was oddly popular as a middle name.
I don’t think Cody is a bad name, either. Other -y names can sound kiddie because they are modifications of a real name or nickname, designed to be cutesy. But Cody isn’t. It never would have dawned on me to think of it as one of those names.
I also think the problem with Dede is not the final sound, but the fact that it’s repetitious, like baby talk. I would always assume it was an affectionate nickname.
Finally, I don’t think Kathy is that bad. It sounds a lot better than Katy, and doesn’t confuse people into thinking your name is Kaitlyn. But I do get not liking a shortened version of your name. The only way I like my name shortened is the way it is in my Username: an initial.
I only wish my name were not so dadblasted uncommon, so I could share it with you guys. Not only I have always absolutely loved it, but I’ve always wondered if my dislike of the nicknamed version is rational. I mostly don’t like it because it’s usually a nickname for another name, and I like that my name is relatively unique.
Lee is my husband’s middle name. We’re apparently the Common Commonly McCommoner family. 
Catholics like to give their daughters Mary, Marie or Maria as a middle name because of the Catholic devotion to the Blessed Mother. Statistically, 22% of the U.S. population is Catholic, so it’s going to be a very popular name.
Well, that is true and I do qualify as Catholic. But I was named after my grandmother, or rather to pacify my grandmother for not giving me the first name she suggested, not for religious reasons.
It is pretty crazy how many women have Ann, Lynn, or Marie as a middle name. It seems much more consistent than with guys.
I am on the side of thinking Cody is a tough-sounding name for an adult man. I have heard far worse names.
I think Cody is ok, but it does make me think of someone younger.
My parents named me after a favored cousin, Elizabeth Jean. But she went by Betty Jean or BJ. So my parents called me BJ pretty much from birth, despite them not being my initials nor calling me Betty Jean.
I was in second grade the first time someone called me blow job. And high school was fun, as you can imagine.
But Beej or BJ is just who I am. In court the judges call me Elizabeth. But the bailiffs, clerks, and judges off the bench call me BJ. 
This pretty much sums it up for me, too. Kathryn from my mother meant she was very annoyed with me. Kathryn Margaret meant I was seriously trying her patience, and when she used all three names (first, middle, last), look out!
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I don’t think Kathy is that bad. It sounds a lot better than Katy, and doesn’t confuse people into thinking your name is Kaitlyn. But I do get not liking a shortened version of your name. The only way I like my name shortened is the way it is in my Username: an initial.
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Thanks for the first part, and I get not liking a shortened version of your name, too. But I’ve been called Kathy for all of my 50+ years, and I’m used to it and I like it. It’s become a part of me, as have Kath and Kat, other versions some people call me. Since I’m not called Kate or Katy, no one has ever thought I was a Kaitlyn, but knowing I was a “K” Kathy, some people have assumed I was a Kathleen. I haven’t gotten that in years, though, probably because Kathleen seems to be way down on the popularity list these days.
And let me just take this opportunity to remind people that although it may feel like you’re having a conversation with only one (or a few) person (people), plenty of others are reading your posts, and you might want to take a moment or two to think if your words might gratuitously insult someone out there. I was heartily offended by Silver Tyger Girl’s bald pronouncement that my name is “just kind of an ugly name anyway.” It’s not that I think every one should love the name; if she had just said that it was a name she’d never cared for, hey, that’s cool. There are plenty of names I don’t care for, too. But I don’t go posting how they’re ugly, or dumb, or silly on message boards when to do so might offend some one I have no intention of offending.
I love this. 
Just in case anyone missed the poll:
My middle name’s Marie, because…it tied the first and last names together. No religious or family reason.
ETA: Whoops…my middle name is now my husband’s last name. Changed it when I got married, and almost forgot!
The only Cody I knew, I knew in grade school, so…
(That Cody aside, I don’t think I’ve ever thought as the name as being particularly childish. Or particularly anything- the only association I have with “Cody” is blond hair).
Cody only got really popular in the 1980’s, so yes, most of today’s Codys are youngish. As you get older, the profile of the name will get older as well. I mean, you probably don’t think of ‘Gilbert’ as a young name, but it once was - in the 1930’s and 40’s.
That said, people seem to identify that -y ending as too childish for boys right now. Witness the rise of the mostly made-up name Braden, possibly because people thought Brady sounded to nickname-y. Read a whole essay on the subject here.
The -en thing is really interesting, since the -n in a lot of those names (Aidan, Kevin, and a zillion girls’ names—Kathleen, Eileen, Maureen, Megan, Doreen) is from Irish Gaelic, where it’s a diminutive almost exactly equal to English -ie / -y. I guess in the translation to English, the “small / cute / dear / nice” part gets lost and it just sounds like a name.
I agree. My middle name is Marie, and my two sisters have Ann and Lynn as theirs. I always thought that was so boring. Maybe after my parents came up with our first names, they ran out of ideas.