I remember being told that in the ancient Greek city states; a man killed the ruler. When he was asked why he did it, he said so that his name would be remembered forever more. To punish him (along with giving him the death penalty), they decreed that his name be removed from all documents, all buildings, never to be spoken again!
Today, we know him only as “Anonymous” which is where that word received its meaning.
I have tried to verify this on the web without success.