- Ognir and the Night People
- Ognyan Fetov
- Ognyan Vasile
- Ognyan Vassiliev
- OGOGO
- Ogom
- Ogre
- Ogre
- Ogres de Barback
- O'Grime
- Ogris Debris
- Oguinye
- Ogun
- Ogun
- Ogun Celik
- Ogün Sanlisoy
- 小倉優子
- Ogurusu Norihide
- Oguta Bobo
- Oguz Aksaç
- Oguz Boran
- Oğuz Büyükberber
- Ogwang K
- Ogwang Lelo Okoth
- oh.
- Oh Astro
- Oh Astro
- Oh, Be Clever
- oh black choochie
- Oh Bonic
- Oh Brothers
- Oh! California
- Oh Captain My Captain
- Oh Chentaku
- Oh Condor
- Oh Crap! Ninjas
- Oh D
- Oh Dae Won
- Oh Darling
- Oh-Edo Typhoon
- Oh! Ficial
- Oh Gee Horns
- Oh Group
- Oh Happy Day
- Oh Hwa Pyoung
- Oh It's Teddy
- Oh Jay
- Oh. Jay!
- Oh Jay Mayo
- Oh, Jeremiah
- Oh Jong Hyuk