The real name of the famous British wrestler Big Daddy was Shirley Crabtree . I think you would have to be a wrestler to get away with a name like that.
Rory is one. Apparently, one of the characters on the OC was a girl named Rory, a fact that greatly disheartened my male roommate.
I know a woman named Billie, not short for anything. Don’t think that one will be going femine anytime soon.
Some of the names listed on the Wiki list depend on a US accent. For instance, I would never have considered Berry and Barry to be the same name because they sound so different from each other with my Australian accent. Likewise, I had no idea that Aaron and Erin were confused with each other until I heard Americans say the names. Also - are there really people out there named Curly/Curley? Wow, you live and learn!
Possibly Virginia?
I have met a female Rowan, but only one, I suppose.
As for “Mac” names …BAH! They should be surnames, I say! 
In today’s (London) *Times * There is the obituary of Sir Carol Mather, Former Guards officer and Conservative MP, who was born in 1919. I know that Karol is a quite common name in Slavic countries, but I have never seen this Anglicised version.
How about Brooke as a guy’s name? That’s a new one to me.
But Brooke McEldowney, creator of 9 Chickweed Lane (my new favorite comic strip, thanks to Hamadryad), sure looks male to me.
I was wandering around an old cemetary yesterday and saw a marker for a man named Cleo, died around 1937.
I came in here to mention “Mackenzie.” I’m the only guy I’ve ever met with that first name. Everyone else named Mackenzie tends to be an eight year old girl.
With that in mind, 
to Celyn.
I would have said that about Lynn too, but I knew a Lynn Shields in college (boy) and a Lynn Shields at work (girl).
Kim apparently works for both as well.
Carroll O’connor starred as Archie Bunker in All in the Family.
There are a lot of gender ambiguous first names in my family.
Kerry - my father
Bobbi - my mother
Glynn - my brother
I also have a (male) friend named Carrol - he goes by his middle name.
Wasn’t the guy Scarlett O’Hara was hot for in *Gone with the Wind * named Ashley?
That’s one of my pet board peeves - if you’re enough of a pain in the ass not to put a real location in your Location bar, you ought to say where you’re from if you’re in a thread where it might matter. If you don’t, I’m sure not going to any special lengths to look you up.
Upon reading that again, as it didn’t post but may have double posted, I realized it could be taken terribly bitchy - I didn’t mean it that way, it’s just something that annoys me, and I’m leaving it here in case it did double post. No intent to really offend.
Lavinia, as one option from a Wikipedia search.
I think Carroll (note the different spelling) is of Irish origin, but I have never seen Carol as a man’s name.
I remember a pit thread about this opinion, and my reply was to point out that in my case I’d had my location listed for a long time in a very clear and explicit fashion, and nonetheless often got US-centric responses in discussions. (Are we supposed to preface every reply with ‘as a non-American…’?
So I decided “fuck it, if you can’t be bothered to look up two inches to check the very clear information I’ve given you, I shouldn’t feel obliged to be so obvious”. And in defence of my stance, my location is still very easy to figure out for anyone who cares.
As in current NFL DB Kim Herring and former NFL LB Kim Bokamper.
I meant to add “before today”
And former Dragon Magazine editor-in-chief Kim Mohan.
Did he tell you your fortune, in a really bad Jamaican accent?
If it wasn’t bad enough that my husband and I share the same initials, we now have to grapple with the fact that we both have gender ambiguous first names, according to your list. Oh the confusion!
…But I’ve never heard of a bloke called Fay