Kane
no the Undertaker and Kane are not even real bros its just for WWE
Kane and the undertaker
VOILENCE AND HIS BROTHER THE UnDeRtAkEr
No
Not really, its just part of the WWE storyline where Kane and Undertaker are rivals.
The Undertaker doesn't have son, although his Kayfabe brother in the WWE is Kane.
Given their WWE careers I think it is safe to say the answer is The Undertaker
The Undertaker and Kane were really close friends.
The Undertaker and Kane Brothers of Destruction
Undertaker, HHH, Kane, and HBK
Theyare half brothers