Ooor more helpfully you can reply with:
Try visiting the Users page in your WordPress dashboard.
Once there move your mouse over the user icon in that list. An "Edit" link will become visible. Click that link.
Scroll down to Name and fill out the "First Name" and "Last Name". Once you do then click on the drop down labeled "Display name publicly as" and select how you want to display your name.
Save that by clicking the "Update Profile" button on the bottom and you should be good to go.
*Drinks more coffee*