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O
O Emperor
O.T.T.
Oak
O'B, Mick
OBCD
Obelisk
Obernik, Sam
Oblique Strategy, The
Oblivion Junior
O'Boyle, Una
O'Brien, Ant
O'Brien, Barry
O'Brien, Brian
O'Brien, Deke
O'Brien, Eoin
O'Brien, Richard
O'Brien, Siobhan
Obskure
Obsolete
O'Callaghan, John
O'Callaghan, Liam
O'Caoimh, Cormac
O'Carroll, Hugh
O'Connell, Maura
O'Connell, Robbie
O'Connor, Eamonn
O'Connor, James
O'Connor, Mairtin
O'Connor, Mark
O'Connor, Robert
O'Connor, Sinead
Ocromon
Octopuss Underground
1990s funk-rock band pre-dating Fairuza
Odd Couple, The
Sligo-based jazz group featuring ex-members of Those Nervous Animals
Oddsocks
Oddsocks Revival
ODi
O'Donoghue, Paul
O'Donovan, Eimear
From Cork, Eimear is a former member of KVX and Batum collaborator
O'Dowd, Mairead
O'Driscoll, Jason
O'Dronai, Daithi
O'Dwyer, Mary
O'Dwyer, Rachel
Offshore
O'Flanagan, Shamus
O'Flynn, Ciara
O'Flynn, Gerald
O'Flynn, Liam
O'Grady, Ann Marie
O'Grady, Yvonne
Ogre
O'Halloran, Dessie
O'Hare, Garrett
O'Herlihy, Paddy
Oisin
Old Man Polka
Old Red
O'Leary, Aoife
O'Leary, Steve
Ó'Lionáird, Iarla
Oliver Brothers Incorporated
Olivetide
Olympic Lifts
Omagh Community Youth Choir
O'Mahony, Clare
O'Mahony, Donal
O'Malley, Kate
O'Malleys, The
O'Maonlai, Liam
O'Meara, Alan
Omelette
Once Bitten
One Day International
One Man Down
One Mind
One More OutNumbered
One Week Of Days
O'Neill, Lisa
Onion
Only Fumes & Corpses
Only Taking Time
Only Us
ONOFF
O'Nuanain, Carthach
Oona & The Devils
Oona Fortune & The Pavement Kings
Ooops
Open Door Policy
Open Kitchen
Operating Theatre
1980s theatre and musical project featruing Roger Doyle and Olwyn Fouere
Operation See Saw
Oppenheimer
Orange
Orange Fettishes, The
Orangewood
Orchestre Murphy
Orchid
O'Reilly, Danny
O'Reilly, Marc
O'Reilly, Melanie
O'Reilly, Paul
O'Reilly, Rose
Organics
Organisation, The
Organised Chaos
Organized Confusion
O'Riada, Sean
Original Rude Boys, The
O'Riordan, Dolores
O'Rourke, Declan
Orphanage
OrphanCode
Orpheus
O'Shea, Brendan
O'Shea, Michael
O'Shea, Niall
O'Snodaigh, Ronan
O'Sullabhain, Michael
O'Sullivan, Camille
O'Sullivan, Catriona
O'Sullivan, Gilbert
O'Sullivan, Mark
Cork-born, Stockholm-based electro/house musician [ex-No Sangoma & The Caroline Shout]
O'Sullivan, Noelle
O'Sullivan, Pat
Other Kin
Grunge-pop band based in Dublin
Otis & The Intellectuals
O'Toole, Fran
Otranome
OTT
Ottos, The
O'Tuama, Conor
Our Krypton Son
Our Little Secrets
Out Of The Shadow
Outcasts
Outfit, The
Outpost Alpha
Over Nine Waves
Overhead, The Albatross
Owensie
Oxy & The Morons
Oz
