Or if it's a very small network, use the names of chesspieces. My dad used the names pawn, rook, knight, bishop and queen for the systems that he has in his network. The name also was related to the power of these systems too. The webserver is queen, his main computer is rook. Two other systems for testing were called knight and bishop and a small laptop was called pawn. The scheme thus also indicated the importance of his system.
And I've asked him when he would have a computer called king but he replied there already was a king. He was the king because without him, game over. It is an interesting way to give names according to their importance.