Other than made up or misspelled names:
Most -lyn or -ly/lee/leigh/li names with the exception of Jocelyn, Madelyn, Hadley, and Paisley
Boy names on girls
Names from my generation (Nicole, Tiffany, Amanda, Lindsey, Tracey, Megan, Samantha, Holly, Brittany, Courtney, Joshua, Kevin, Nathan, etc. Why were these appealing?)
The Aiden craze
Jordan (on either gender)
Morgan (love on a boy, no on a girl)
Names heavily associated with Abrahamic religions with the exception of Lazarus, Ruth, Enoch, and Felix
Title names like King, Prince, Princess, Goddess, Messiah, etc.
Draven (I use to love this during my goth phase when I was 14-15)
Culturally insensitive names (Like a Caucasian person naming their child Sayuri, Yuki, Mohammed, Krishna, etc.)
Over the top word names (Taking from kids I have actually met: Twilight, Window, And Easel...not even "hippie", just bizarre)
Rowan on a girl. Love it on a boy.
My biggest grievances are with surname names, boys names on girls and made up rubbish. I'll try to pick specific ones...
Cricket – Rugby? Golf? Football?
Emmett - slang where I'm from. Bloody emmets...
Atticus - I dislike the sound and find it a bit silly. But as a brother to Lofton and Kitchenette? It could work.
Any English city - mostly, they're very grim places.
Desmond, Gavin, Graham, Alan, Derek & Ian - these men are in their 50s at least
Brayden, Brandon - they sound so bland. I think of Bran Flakes and a donkey braying.
Audrey – that old woman on Corrie
Atlas – to join siblings Ordnance Survey and Road Map?
Wilder, Rebel, Gunner, Maverick – no!
Clover – cow/margarine name. “We alllll love Clover, it's the way that it's churned!”
Magnolia – the boring colour walls are painted
Maximus – Gluteus Maximus
Wesley - unattractive sound
I also agree about Magnolia, it's a beautiful tree but I think paint.
Emmett; it's awesome and I'm unfamiliar with the slang), but the Clover one made me literally Laugh Out Loud, which I disguised as a cough and now my mum thinks there's something wrong with me. :) Also, my 17-year-old brother is called Alan, but he's already been told it's an old man name. :)
You could also add Malcolm to the old man list. I hear all the time on here and do not get it at all.
Desmond isn't used very much in my area, but Gavin is very popular among boys---the oldest Gavin I've met was about 13 or 14 and the rest were elementary school age (5-10-ish), though I had a great-uncle whose name was Robert Gavan. I also had a classmate in the second grade named Alan as well as a kindergarten classmate named Derek and two high school friends named Ian---they'd be about 24-25 now, and most American Dereks and Ians would be 15-35-ish. And my teenage sister has a friend named Graham; they met a 30-ish man named Graeme and there was much rejoicing.
It's funny, but I had the exact opposite reaction to yours when I first heard of Sir Derek Jacobi: "You mean there's someone named Derek who's over 35?"
Ditto Hannah (such an ugly sound but so so common, there are so many in my grade and it's my middle name...huh?) and Olive (I mean I love the food, but as a name?) Others not including the names usually universally hated by actual name lovers like Kaylin and Raylee etc:
Pippa : Just awful . I use it as a sexual term .
Sloane : dont like the sound
Harriet : see above
all the den trend except Aiden .
Lauren : to me this a name for mean girls . I dont know why .
Tallulah / Tabitha : they sounds horrible on my ears .
Harper : the only er name i dislike .
Mabel : way too old imo .
Winnie : Winnie the Pooh ??
Horribly misspled names . I dont mind thought things like Alison .
Susannah : Its seems to be quite popular here . I dont know why . I have an 70 yrs old gran with that name . Soooo old fashioned .
Poppy : just bleh to me .