I signed up for the Halo Insider stuff a while back and it gave me a random name. With the upcoming Firefight I would like use a name people will recognize me by.
Your Waypoint profile is linked to the Xbox Live account you signed up with, so you have to change your Xbox gamertag.
This can be done here—first change is free, any subsequent change has a fee.
Just keep original name. It makes it OG.