Change in child's surname

Hello if mother want to change her child name after divorce than she can do same after divorce you file for application to change her child name and same process will follow as you change your name ,

you need to show your good reason why you change name and if you have divorce than you show divorce decree for this after legal document your  publish to name change in newspaper in your local area and as well local language which one is good 

so if there no one have any obejction on  this ground than you can change your child name legally.