When the Undertaker signed with WWE in 1990, his original name was going to be "Cain The Undertaker." It's an interesting name considering what they came up with for his fictional brother. Before he debuted at Survivor Series in 1990, the name was shortened to just The Undertaker. Obviously that was the right decision for his character. There are a lot of stories about his run as Kane the Undertaker and whether he actually worked house shows under that name. This video would suggest he did;