Hello Lasya Priya,
In order to change your profile name, please click on your picture in the upper-right corner and then click "Settings." Then in the "Contact Info" section you should be able to edit your first and last names. Let us know if you have further questions.
Interesting this one - the sets of names aren't even two but three if you consider the one we are now seeing - Chunduru C.
Anyway, you are in good hands, I can see Valerie has already given you a solution.