I have a Passport.when I got my passport at that time there are two names of my mother.but one is pet name other is documentary.but by mistake I wrote pet name of my mother.now I want to change my mother's name in my passport... is it possible to change my mother's name in my passport. if any then plzzz reply me... .. thnak you...

Go back to passport office and ask them to correct..
You may have to pay a fee, same amount like getting a new passport. It's not their fault.. it's yours.