- O
- OO
- OO
- OO
- OOak
- OakOb
- ObObl
- OblOC
- OCOce
- OCEOct
- OctOcu
- OcuOdd
- OddOdi
- OdiODZ
- OeOff
- OffOff
- Offogo
- ogoOh
- OhOHN
- OhnOje
- OjeOKA
- OKAOku
- OkuOla
- OlaOld
- OldOle
- OleOli
- OliOli
- OliOls
- Ols
- OmaOme
- OmeOmn
- OmnOna
- OnaOne
- OneONE
- Oneone
- OneONI
- OniOnl
- OnlOny
- OnyOos
- OosOpe
- OpeOpp
- OprORA
- OraOrb
- OrbOrc
- OrcOrd
- OrdOrg
- OrgOri
- OriOri
- OriOrm
- OrmOrq
- OrqOrs
- OrsOru
- Osb
- OsbOse
- OseOsm
- OsmOst
- OstOth
- OthOtt
- OttOty
- OtyOur
- OurOut
- OutOut
- OutOut
- OutOve
- OveOvi
- OviOwe
- OweOxa
- OxbOZ
- Oz
- ozz
- Otherkin
- OTHERLiiNE (George Fitzgerald & Lil Silva)
- Others by No One
- Others, The (UK dubstep producer)
- Others, The (2000s UK rock band)
- Others, The feat. Geoff Smith
- Otherview
- Otherwise (US hard rock band)
- Otherwise feat. Costello, Ashley
- Otherwish (Progressive house musician)
- Othila (neofolk / ambient group)
- Othmane Bali
- Othmer, Julia
- Othuum (german doom metal band)
- Otierre
- Otik (dance music)
- Otile Brown
- Otilia (Otilia Bruma)
- Otira (French DJ & producer Mederic Martin)
- Otis (southern blues rock from Sulphur Well, KY)
- Otis (Alternative rock/post-grunge band from Phoenix, Arizona.)
- Otis (Mozambican saxophone player)
- Otis Stacks
- OTIS VCR
- Otis Zola
- Otis, Johnny
- Otis, Johnny, Show, The
- Otis, Johnny, The, Rhythm & Blues Caravan
- Otis, Jon (American drummer, producer, bandleader)
- Otis, Shuggie
- Otkroveniya dozhdya
- Otlo
- Otnicka (Electronic Musician)
- OTNOSE. & plagueinside
- Oto
- oto (Pascal Hubert, Farid Dahalb & François Rousseau)
- Otoboke Beaver
- Otoda, Masanori
- Otokogumi
- Otomo, Yoshihide
- Otonose, Kanade (ReGLOSS)
- OTPendia
- OTR (Downtempo electronic producer)
- OTR & Au/Ra
- OTR & Devault
- OTR & Jones
- OTR & Panama
- OTR & Rory Wynne
- OTR & Shallou
- OTR & Vancouver Sleep Clinic
- OTR feat. Shallou
- Otra Cara de la Nada, La
- Otra Fe, La
- Otra puse
- Otrabanda
- Otracami (project of Camila Ortiz)
- Otro
- Otro Grupo, El
- Otro Mambo
- Otro Nivel
- Otro Yo, El (Argentine rock band)
- Otroci socializma
- Otropic t(H)ree
- Otros Aires
- Otros Colores
- Ots, Georg
- Otsochodzi (polish MC)
- Otsochodzi feat. Rosalie.
- Otsochodzi feat. Szopeen
- Otsochodzi feat. Włodi
- Otsochodzi feat. Young Igi
- Otsuka, Ai
- Ott (UK producer/psychedelic dub multi-instrumentalist)
- OTT (late '90s Irish boyband)
- Ott, Alex
- Ott, Alice Sara (pianist)
- Ott, Carey
- Ott, Christine
- Ott, Jeff
- Ott, Kerstin (German (Berlin) Singer)
- Ott, Kerstin & Fischer, Helene
- Ott, Kerstin & Zucker, Ben
- Ott, Kerstin, Berg, Andrea
- Ott, Kerstin, Carpendale, Howard
- Ott, Kerstin, Fischer, Helene
- otta
- Ottaviani, Giuseppe
- Ottaviani, Giuseppe & Ball, Jessica
- Ottaviani, Giuseppe & Bender, April
- Ottaviani, Giuseppe & Burns, Christian
