| A-Z Heavy Metal |
| 72 grupos/bands con/with U (1/25) +26 (Undertow) +51 (Unruly Child) |
| Grupo | País |
| U.f.o. | BRA |
| U.k. Subs | Eng |
| U.s. Bombs | |
| Ugly Americans | |
| Ugly Kid Joe | USA |
| Ugly Mus-tard | |
| Ultimos De Cuba | ESP |
| Ultraspank | POL |
| Ulver | NOR |
| Umbra Et Imago | GER |
| Unanimated | SWE |
| Unbounded Terror | ESP |
| Uncanny | |
| Unchained | |
| Uncle Ho | |
| Uncle Meat | |
| Uncle Sam | USA |
| Unclean | CZE |
| Uncurbed | |
| Under A Dying Sun | |
| Under Black Clouds | |
| Under Moonlight Sadness | MEX |
| Undercroft | CHI |
| Undergod |
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