Andy Sixx's real name is James Michael "Andy" Biersack. He adopted the stage name "Andy Sixx" as a tribute to the legendary bassist Nikki Sixx of Motley Crue.
He was a huge fan of Motley Crue and saw Nikki Sixx as a role model. He chose the name "Sixx" as a way to acknowledge his admiration for Nikki and to embrace the rock and roll spirit that Nikki embodied.