Name change

right now I am using my mom’s last name and I would like to add my father’s also so I was just wondering if anyone knows how much it costs(if anything) to do it

My friends uncle changed his name, said it cost him ~$450 after buying new id’s and such. hope that helps.

It’s almost a family tradition to use our 2nd name as the 1st is always Mom’s, Dad’s or Gramma’s. They weren’t going to let me on the plane because my ticket was in MY name and not my fathers.
I don’t want to change my name. I want to change the small minded in officaldom instead.