Because Kane (Glenn Jacobs) and The Undertaker (Mark Calaway) got married. They are full blooded brothers with different last names
You put down both of their last names in your question...How hard is it to figure out that Jacobs and Callaway are two DIFFERENT names? O_o
Glenn Jacobs and Mark Calloway
Batista = David Bautista , Rey Mysterio = Oscar Gutierez , Chris Jericho = Christopher Irvin January 2009 HBK/Shawn Michaels= Michael Shawn Hickenbottom, HHH=Harold Henry Helmsly, Big Show= Paul Wright, Mr. Kennedy=Ken Anderson, Boogeyman=Marty Wright, Edge=Adam Copeland, Undertaker=Mark Calaway, Kane=Glenn Jacobs
John Glenn's parents names are Clara Sprout Glenn and John Glenn.
His birth name is Mark William Calaway (born March 24, 1965).Mark William CalawayMark Callaway x
yup, their names are Charlie Glenn, Jake Glenn, David Glenn, Phillip Glenn, Phyllis Glenn, and Katie Glenn.
Steve and Joanie
neal Armstrong and john glenn
Dexter, Jesse, Bruce, Glenn, Marianne, and Glenn
mark callaway has had 6 wrestling names. kane the undertaker master of pain "mean" mark callous the punisher texas red the undertaker
his mom name is betty
John Glenn