He isn't.
Iain Duncan Smith's birth name is George Iain Duncan Smith.
Iain Duncan Smith was born on April 9, 1954.
Iain Duncan Smith was born on April 9, 1954.
Iain Duncan Smith goes by I D S, and The Quiet Man.
Iain Duncan Smith is 57 years old (birthdate: April 9, 1954).
Iain Duncan Smith
iain duncan smith
Iain Crichton Smith was born in 1928.
Iain Crichton Smith died in 1998.
Iain MacDonald-Smith was born in 1945.
Iain Smith - producer - was born in 1949.
George Smith Duncan died in 1930.