Client script for DayZ Standalone to attempt to prevent the use of Survivor default name. This is a 3_Game script. Packaged PBO for drop in your server’s client mod: https://wrdg.net/dl/SteamNameSupport.zip

DayZGame.c

/*
    *
    * Name: Steam Name Support
    * Description: Attempts to rid of default use of Survivor name
                   by using the player's Steam name.
    *
    * Author: Wardog, wrdg
    * Site: https://wrdg.net/
    *
*/

#ifndef SERVER
modded class DayZGame
{
    override bool OnInitialize()
    {
        string name;

        GetPlayerName(name);
        name.ToLower(); // case in-sensitive

        if (name == "survivor")
            SetPlayerName(GetUniqueName()); // change name if default

        return super.OnInitialize(); //! important, call hierarchy last
    }

    /*
    //? Only use player's Steam name
    override bool OnInitialize()
    {
        SetPlayerName(GetUniqueName());
        return super.OnInitialize(); // call hierarchy last
    }
    */

    string GetUniqueName()
    {
        BiosUserManager manager = GetGame().GetUserManager();

        if (manager && manager.GetTitleInitiator())
            manager.SelectUserEx(manager.GetTitleInitiator()); // set user as Steam user

        if (manager && manager.GetSelectedUser())
            return manager.GetSelectedUser().GetName(); // get Steam name

        return GetProfileName(); // almost impossible to get here
    }
}
#endif