How to change Gmail user name?

My brother created a gmail account for me, but I want to change the user name he set up. I can't find anywhere on the website that will allow me to do that.

I changed my user name in my Messenger. But will my old contacts be able to see the new user name or the old user name?

So as usual google has ****** up another thing. So when i made my account on youtube it didnt give me an option to create a user name for my youtube account. So now my youtub user ame is set at James Way (my name). I cant figure out how to change it...

I've a company fan-page on Facebook: http://www.facebook.com/pages/Druklandnl/148852775166379 for my company-website http://www.drukland.nl . I want to change my user name to "druklandnl" so that the link to my Facebook page will be facebook...

How can I change the domain name of a Gmail address ? I bought a domain name for my Blogger blog (Blogger belongs to Google) and I got a free Gmail account from Google Apps. I would like to change the name of my address. current : name.familyname@gmail...

I want to change the user name on my Yahoo Messenger so that a certain person won't know that it's me. But I still want to keep my present user name on my account. Can I do that? And how do I do that?

I have windows vista, and I changed the user name, and on the desktop it displays the name I picked, but when I go into the directory (C:/Users) It has the user folder under the old name (for example, it still has it on "Claire", while I actually...