• 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)
• Månegarm (Viking/Black/Folk-metal)
• Marțolea (Folk/Black metal) ‡
• MaterDea (Symphonic Folk Metal/Rock)
• The McGonagalls (Celtic Punk)
• Medved’ (Folk-metal)
• Melechesh (Black/Middle Eastern metal)
• Menhir (Pagan Black 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)
• 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)