Too many names to mention tbh ... frightenly enough, so many of todays most popular would make me cringe to hear on a grown-up.
Nicknames of all sorts, even sane ones like Alfie, Freddie, Harry, Archie, Charlie, Daisy, Pippa, Dolly and Rosie. I just don't think I'd be able to take Judge Rosie __________ or President Archie __________ serious.
Then there are those Peyton, Makayla, Jayden, Rylie kind of names which I personally think sounds absolutely ridiculous (on both children and grow-ups, but mainly on grown-ups).
Then there are the whacky ones like Apple, Pilot and Jupiter Sun-Stone-and-Rainbow Brian (overestimating, but you know what I mean :D).
Daisy if that helps. She also runs an art therapy program & is very successful.
Honestly as all of the Masons & Lolas age so will our perception of these names.
I wouldn't use something like Colby or Kirby because they sound juvenile o me so I get the concept and all..
But I think in 40 years Alexis, Ashley. Emily, Kayla & Caitlyn will sound like Barbara, Debra, Susan, Theresa, ect to the younger generation
All of the cutesy, nickname-names: Ellie, Kaylee (and Jaylee, Braylee, and whatever other kreeativ variations are in vogue), Hailey, Miley, Kylie, Riley (avoid anything -iley or -aley, pretty much), Kelsey, and even Emily (I always do a double take when I meet a grown woman with this name).
Anything with a -leigh ending instead of -lie or -ly.
And...*shudder* boys names on girls.
Other than names more akin to a typical episode of Toddlers and Tiaras, I can't picture a woman named:
Holly (and sadly, Breakfast at Tiffany's didn't change that for me, even though I really like that movie)
Macy (I know a 10-year-old girl named this, so that could be why)
Lolita (but possibly Loleta)
Jessie (not so much this one. I can't picture it on anyone above the age of 30)
I also would find it very difficult to take, say, a lawyer seriously if she had an ultra-whimsical name like Breeze, Lyric, or Passion.
There was some discussion of Melissa, which I can see on an adult, but there was a girl who rode my school bus who had that name but went by the nn Missy. She'd have to be about 30 now, so I really hope she's not still called Missy.
Also, someone said -ie names, but I find those in general more acceptable than -i or -ee names. For instance, I can see Jamie on an adult much easier than Mandee or Brandi.