Changing the author name

Hi,

i am new to wordpress and looked through what I could be struggled to find the answer so I am hoping someone here can answer

I have recently added a new domain to a current hosting package I have with hostgator. I have set it up and uploaded wordpress with no issues. however I want my author name for blog posts to be different to the one it currently is…. I have looked around but am still none the wiser how to go about changing it

has anyone any idea how I do this?

thanks in advance

nick