- tT
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- TTab
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- TapTar
- TarTat
- TatTaw
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- TayTay
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- TheThi
- ThiThi
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- TWOTy
- TytyD
- TyeTyl
- TylTyp
- TypTYu
- TyvTzu
- Theophany (video game arrangement)
- Theoretical Girl (Amy Turnnidge performance name)
- Theoretics
- Theories
- THEORIST (progressive metal band)
- Theorist, The
- Theory (Danish power metal band)
- Theory Hazit feat. B.Reith
- Theory in Practice (Swedish Technical Death Metal)
- Theory of a Deadman
- Theory of a Deadman feat. Cooper, Alice
- Theory of a Deadman feat. Rooney, Joe Don
- Theory, Nameless
- Theory, Trigger (New Zealand rock quartet)
- THEOS (French electronic music producer)
- Theotoxin (black/death metal band)
- TheOvertunes
- Theoz
- THePETEBOX (The Petebox, Petebox)
- ThePlasmas
- Thera (artist from Anchorage)
- Thera, DJ (hardstyle DJ and producer)
- Thera, DJ & Sjammienators
- Theraphosa
- Therapie TAXI (French rock group)
- Therapie TAXI feat. Elvis, Roméo
- Therapy? (Irish alternative metal band)
- there (Israelli dream-pop duo)
- There Are No More Four Seasons
- There for Tomorrow
- There There Theres
- There Will Be Fireworks
- There's a Light (Post-rock band from Lahr/Schwarzwald, Germany)
- There's Talk
- There’s a Tuesday (New Zealand dream-pop band)
- TheRealbdr
- TheRealTheWarrior
- Therefore I Am
- Therein (Australian progressive metal band)
- Therese (Swedish euro house artist Eva Therese Grankvist)
- Thériault, Alex (auteur-compositeur-interprète québécois)
- Theriault, Nicole
- Thério, Marie-Jo
- Theriomorphic
- Therion (Swedish symphonic metal band)
- Therion feat. Marcolin, Messiah
- Theriot, Shane
- Thermal and a Quarter
- Thermality
- Thermals, The
- Thermo (Mexican punk band)
- Thermostatic (Swedish electronic)
- Theron, Elizma
- Therr Maitz
- Thes Siniestros (Rock rrio from La Plata, Argentina)
- These Animal Men
- These Are They
- These Arms Are Snakes
- These Brittle Bones
- These Fading Visions
- These Five Down
- These Four Walls
- These Green Eyes
- These Hearts
- These Immortal Souls
- These Kids Wear Crowns
- These Miles
- These New Puritans
- These New South Whales
- These Reigning Days
- These Things
- These United States
- These Wicked Rivers
- TheSecondSex
- Theset
- Thesleff, Axel
- theSoul
- Thesyre (Canadian black/thrash metal)
- Theumutmusic
- theunpronounceablesign (Fabian Kempe & Tarek Mansur)
- thewalkingicon
- Thewaterboy
- theWorst
- Thexele
- They Are Gutting a Body of Water
- They Dream By Day
- They Grieve (Canadian drone-gloom project)
- They Hate Change
- They Might Be Giants
- They Might Be Giants & Velcro Horns