From Wikipedia: The title Renholdër is a backwards message: If you read the title (including the umlaut) backwards, it says Re: D Lohner. This is a nod to the Nine Inch Nails member Danny Lohner who was in an early version of the band. He works under the pseudonym Renholdër. Also, playing the song backwards, 22 seconds in, you can hear someone say in a high-pitched voice "Hallelujah, Danny Lohner".
From Wikipedia: The title Renholdër is a backwards message: If you read the title (including the umlaut) backwards, it says Re: D Lohner. This is a nod to the Nine Inch Nails member Danny Lohner who was in an early version of the band. He works under the pseudonym Renholdër. Also, playing the song backwards, 22 seconds in, you can hear someone say in a high-pitched voice "Hallelujah, Danny Lohner".