• ‡ Macaria (Folk-metal)
• ‡ Mael Mórdha (Folk/Doom Metal)
• Magda Przychodzka (Folk-metal)
• ‡ Maglor (Folk-metal)
• Mago de Oz (Folk/Celtic Metal)
• The Mahones (Celtic Punk)
• M.A.I.M. (Folk-metal)
• Maladecia (Folk-metal)
• Malasañers (Celtic Punk)
• Mandragora Thuringia (Folk-metal)
• Manntra (Industrial metal / Folk-metal)
• Månegarm (Viking/Black/Folk-metal)
• ‡ Marțolea (Folk/Black metal)
• MaterDea (Symphonic Folk Metal/Rock)
• The McGonagalls (Celtic Punk)
• McScallywag (Celtic Punk)
• Medved’ (Folk-metal)
• Melechesh (Black/Middle Eastern metal)
• Merkfolk (Folk-metal)
• ‡ Metal Styx (Symphonic Black Folk-metal)
• MetalXis (Instrumentel Folk Melodic Metal)
• ‡ Methysos (Folk-metal)
• Metsatöll (Folk-metal)
• Mickey Rickshaw (Celtic Punk)
• Midgard (Viking/Folk-metal)
• Midnattsol (Melodic/Folk-metal)
• Midvinterblot (Folk-metal)
• ‡ Miellnir (Folk/Viking Metal)
• Mileth (Folk-metal)
• ‡ Minhyriath (Folk/Death Metal)
• ‡ Minos (Folk-metal)
• Minotaurus (Celtic Folk-metal)
• ‡ Minotaur’s Redemption (Folk/Trash)
• Mirrorshield (Power/Folk-metal)
• ‡ The Mist and the Morning Dew (Folk-metal/Doom)
• Mistfolk (Folk-metal)
• ‡ Mithotyn (Viking/Black Metal)
• Mjød (Folk/Viking Metal)
• Moksh (Vedic Metal)
• ‡ Mondstille (Folk/Black Metal)
• ‡ Mondvolland (Folk/Black Metal)
• Mongol (Folk/Death Metal)
• Moonsorrow (Folk/Pagan/Black Metal)
• Morgarten (Folk/Black Metal)
• ‡ Morgenstern (Folk-metal)
• Morhana (Folk-metal)
• Moriandum (Folk influenced Black Metal)
• ‡ Morok (Folk-infl. Pagan Black Metal)
• Moriquendi (Atmospheric Folk-metal)
• Mornir (Folk/Pagan Metal)
• ‡ Moss of Moonlight (Black/Folk-metal)
• Motanka (Mystic Metal)
• Mr. Irish Bastard (Folkpunk / Folk-rock)
• Munarheim (Symphonic Dark Folk Metal)
• ‡ Munruthel (Black Pagan Folk-metal)
• Der Münzer (Mittelalter Hardrock)
• ‡ MuyzKKubuN (Folk-metal)
• Myrath (Oriental Folk-infl. Prog. Metal)
• ‡ Myrkgrav (Blackened Folk-metal)
• ‡ Myrkvar (Folk/Viking Metal/Black Metal)
• Myrkvedr (Folk / Viking metal)
• Mysteria Mortis (Pagan/Folk-metal)
• MystTerra (Folk/Industrial/Metal)