How do I change the name of my mail?

[bbqsmoke]

My Mac hard drive was crashing and Best Buy was able to backup and reinstall my documents. They didn't follow my instructions and everything was named in my wife's name because she has the
rewards Card in her name.

 

[carlosbutler]

Change the name of the email? Change email account, email signatures, what bit?

 

[bbqsmoke]

Me mail is in her name. And Documents are in her name.