Currently Being ModeratedApr 22, 2013 2:51 PM (in response to redffox)
Apple Menu / System Preferences / Sharing.
In the pane you see, the computer name is displayed, and there is a Edit button. Click that button. Change the name back to what it was so the other devices recognize it.
Currently Being ModeratedApr 26, 2013 9:17 AM (in response to Eustace Mendis)
Sorry - This did not help. I assume my original Macbook is simply Macbook but I still get Macbook (2)