Marmaduke Duke are a Scottish conceptual rock duo from Ayrshire, Scotland, comprising Simon Neil of Biffy Clyro and JP Reid of Sucioperro.
According to Neil, the band, and its albums, are "based on a trilogy of unreleased manuscripts that a friend of ours brought to this country a few years ago.
"[1] To date, the band have released two studio albums, with their second, Duke Pandemonium, achieving commercial success in the United Kingdom.
The album was originally scheduled for release in late 2006, and a three-track sampler CD was distributed to magazines and radio stations in spring 2006.
There is usually also a cloaked/masked figure on stage during performances, known only as "The Duke"; played by Sucioperro's ex-bassist Michael Logg also known as "The Big Slice".