Adam Yauch

Adam Nathaniel Yauch (August 5, 1964 – May 4, 2012), was a founding member of hip hop trio the Beastie Boys. He was frequently known by his stage name, MCA, and other pseudonyms such as Nathanial Hörnblowér.

Description above from the Wikipedia article MCA (musician), licensed under CC-BY-SA, full list of contributors on Wikipedia.​