Celebs not using their given birth name is nothing new, but it's still interesting to see the name they were born with.
Vin Diesel was born Mark Sinclair
Michael Caine was born Murice Joseph Micklewhite Jr.
Portia de Rossi was born Amanda Lee Rogers (Whaaaaaat?)
Bono was born Paul David Hewson
Zedd was born Anton Zaslavski (Zedd is the pronunciation of the letter "Z" in Europe)
SHOCKER Jaime Foxx was born Eric Marlon Bishop....Who Knew?
Bruno Mars was born Peter Gene Hernandez (Surprised by this one)
Lorde was born Alla Marija Lani Yelich-O'Connor
Lana Del Rey was born Elizabeth Woolridge Grant
Iggy Azalea was born Amethyst Amelia Kelly
Jean-Claude Van Damme was born Jean-Claude Camille François van Varenberg
David Bowie was born David Robert Jones
Ben Affleck was born Benjamin Géza Affleck-Boldt
Nina Dorbev was born Nikolina Konstantinova Dobreva
Natalie Portman was born Neta-Lee Hershlag
Jon Stewart was born Jonathan Stuart Leibowitz
Tom Cruise was born Thomas Cruise Mapother IV
Winona Ryder was born Winona Laura Horowitz
Miley Cyrus was born Destiny Hope Cyrus
John Legend was born John Roger Stephens
Katy Perry was born Katheryn Elizabeth Hudson (soooo Kate Hudson?)
Jennifer Aniston was born Jennifer Linn Anastassakis
Christopher Walken was born Ronald Walken