If you have listed your full name on Twitter, then yes. Even if you have your Twitter locked, others can still see your full name.
Twitter is the full name.
The full name of the person who goes by JJJ on Twitter is James Johnathon Jerkyl. This person is a famous singer and rapper, but goes by the name JJJ as it is easy to remember.
I am having the problem.
No, usernames are unique.
His middle name is Bopp. Full name is Asa Bopp Farr Butterfield.
Her Twitter name is @shakira
Taylor Lautner's twitter name is TaylorLautner and he is on twitter
His stepdad's surname is Twist. His full name is Robin Twist (@robintwist on twitter)
taylorswift13 is her username. you can also find her just by searching her name on twitter and looking under "people".
Her Twitter name is @selenagomez
His Twitter Name Is @singerjawan :)
On Facebook you add the @ symbol before a person's name because then you can choose his/her name from your friends list and their name will be tagged in your status and they will notified. Other people will be able to click on the name in your post and get to your friend's profile page. On blogs the @ symbol may refer to a Twitter handle.