How to Change the Name In AP

Hi Sir/Madam,

    I just want a information about name change.

Currently my Name is Kannaiah Esunuru. I just want to change it meshack Esunuru. 

Can any one guide me how to change my name legaly? What is the procedure for name change in AP.

Also advice that, if name changed, whether i need to change all educational certificates, Bank account name,Pasort etc...? 

Pls advice..

Thanks in advance. 

Yours

kannaiah