Onassis
Okay
OK?
Of course, there are tons of Irish surnames starting with O.
O’Toole
O’Malley
O’Connor
O’Loughlin
to name a few. Something like that might work for you.
Another alcoholic name (or non-alcoholic):
O’doul
O Rly?
(sorry… couldn’t resist)
Obi-Wan Kenobi 
Olivia. The vets are always wrong on the prediction thing!
Omnipotent
That was the first name that came to mind for an “O” name when I saw your post.
Meaning:
- almighty or infinite in power
- having very great or unlimited authority or power.
Obama 
[QUOTE=bathsheba8542;6783358]
Ozymandias, although the story may make the name less than preferred[/QUOTE]
“I met a traveler from an antique land…”
Oberon
Orlando
O’Henry
Ohmygoodness
Osgood
(like Charles Osgood, the newscaster)
I had a colt, sold now, by Oswald. His name is “Over The Moon” and his barn name is Ozzie.
How about:
Orson
Once upon a time
Owen
Ozelin
Onslowe
Odette
Otto
Onyx
Olwen
Otis
Oden
Outsider
Osborn
Orchid
OhMeOhMy!
O.M.G.
[QUOTE=Laurierace;6784298]
Olivia. The vets are always wrong on the prediction thing![/QUOTE]
haha! One can only freakin’ hope (and pray, and plead, and beg)! I have my heart set on a variation of Oceana/Oceania if it’s a filly, but I know I’m not lucky enough for that 
I had a colt, sold now, by Oswald.
What a small world, TwinLights! How was he? You’d laugh at my almost panic attack- Oswald got a little too um…“aggressive” with the dummy during my collection:rolleyes: and apparently gave it a pretty nice ram or 2…sounded humorous until he turned up severely lame because of it (though I did get 100+ml in one dose… no wonder she took lol). They were going to geld him, but a past owner spoke up and took him back. Long story short- I was told for a while that my foal would be the last Oswald baby (thus, if a handsome boy, my vet said should be kept intact) HAHA! Right… first breeding…own mostly mares… let’s throw a stallion into the mix. Crisis averted as it looks like Oswald will be ok to breed again anyway. Not sure why lameness would impact collection to begin with, but what do I know?!
LOVING these names! Please, please keep them coming! I appreciate the help more than you know!
George Takei / star trek Fan here…
“Oh My”
Olivier
Oprah
Onion
Oakwood
Here is a link to my Oswald baby’s page. http://www.twinlightsfarm.com/Ozziespage.html
He is coming 5 this year and is in PA. His owner loves him, he has the best disposition!
Good luck with your Oswald baby!
Who has Oswald now? He was sold to a dressage rider in GA a couple years ago. I thought he still had him.
O’ M’Hero
You have to say it fast, and smushed together like a Southerner,
