Heavy metal umlaut

[Link]: "A heavy metal umlaut is an umlaut over a letter in the name of a heavy metal band. Umlauts and other diacritics with a blackletter style typeface are a form of foreign branding intended to give a band's logo a Germanic 'toughness.' The heavy metal umlaut is never referred to by the term diaeresis in this usage, nor does it affect the pronunciation of the band's name."