Without anyone knowing your name or address?
Localbitcoins or a bitcoin atm (if available in your place). The former option needs you to meet someone physically and trade face-to-face. You don't need to give him/her anything about you, just setup a place where you two would meet. The latter is as easy as scanning a qr code and wait for the cash to come out of the machine.
The buyer won't know your name but Localbitcoins will. To be able to sell on localbitcoins, you need to give them your id and have it verified. So someone will know your name which is not what OP wants.