1. The Undertaker and Imposter Undertaker/Brian Lee are cousins

The Undertaker is arguably one of, if not the greatest professional wrestler to ever compete in the wrestling business. Many regard him as their favourite WWE superstar, and there's no questioning why. On SummerSlam in 1994, Taker stepped into the ring with his real-life cousin Brian Lee, who was portrayed as the imposter Undertaker. The two wrestled each other at the event with the real Undertaker coming out victorious.
Lee returned to the WWE in 1997 as Chainz, a member of the biker faction Disciples of Apocalypse (or DOA) along with leader Crush and his cousins, the Harris Brothers, who were renamed Skull and 8-Ball. Lee remained in the WWE until the summer of 1998 when he was released once again. After several years of inactivity, Lee made his Total Nonstop Action Wrestling debut in 2002.