How to change name on Facebook?

I currently have a fake last name on my facebook, and I'd like to change it to my real last initial. When I try to change it, it says I must provide my full name. I've seen just initials before... how do I go about doing this??How to change name on Facebook?
go to settings -%26gt; account settingsHow to change name on Facebook?
edit your account then you can change your name..

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