Jon Udell narrates the evolution of the Wikipedia page on the Heavy Metal Umlaut
Here's the source page on Heavy Metal Umlauts at Wikipedia

I should edit the page to include John Wesley Harding's reference to his fictional East Sussex band, Outhaus, under the “Other usages of diacritics in band or album naming” heading. That is spelled O (slash)-U (umlaut)-H-A-U (Umlaut)-Nazi S.