Pein's fullname is never revealed. Pein is really Nagato, and just an alias that was created.
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Galilio Galilao
Kitty White
Liquid Crystal Display
Central Processing Unit
delhi land and finance
Pyotr Ilyich Tchaikovsky
Vazir Sultan Tobbaco
Siva Kaneswaren
Missouri Service Center
Christo Vladimirov Javacheff