Maybe I'm missing something but ...
Who cares if Codsworth knows your name? He says it a total of three times, and then disapears.
Once you bring people back to Sanctuary, it seems that Codsworth is gone forever!
I'm only 20 or so hours in, and have yet to do many quests (I only just an hour ago set foot in Diamond City); but I have completed the 'Sanctuary' quest along with a few others. Codsworth is nowhere in Sanctuary. I Even tried ringing the bell or activating the siren. Still no Codsworth. Maybe I shouldn't have scarapped the box he came in?
If I am indeed missing something, please feel free to point it out (without spoilers, if possible.)
Thanks!
(for what it is worth, I don't care about him one way or another -- I just find it odd all the hype about him knowing your name and then