A line/strike through on a user’s name means that the user is “inactive”. This means that the user does not have access to Matrix.
If the user’s name is a shortened version of a user, then this would signify that accounts are coming in on their “traffic system code name” (RBUTL might be for Rhett Butler). In this case, the manager would contact Matrix Support and request that the user’s code be merged into the proper user’s name.