- Out of Loop -- Outblast
- Outbound Road -- Outhud
- Outka -- Outrage
- Outrage -- Outvasion
- Out've the Box -- Ove Lind
- OVe-NaXx -- Overdr1veZ
- Overdream -- Overmaster
- Overmindz -- Ovidi Montllor
- Ovidio Aguilar -- Owen Duff
- Owen Duggan -- Owen's Grudge
- Owensie -- Oxigen
- Oxigyzer -- Oysher Family
- Oystar -- Özer Atik
- Ozetta V. Bennett -- Ozzie Melendez