Anonyponymous

Anonyponymous, as its subtitle reveals, is about, "the forgotten people behind everyday words." The author, John Bemelmans Marciano, has written about eponymous words including cardigan, crapper, and frisbee and about the people for whom these words were named.
In talking about John Montagu, the fourth Earl of Sandwich, Marciano states the following:
In talking about John Montagu, the fourth Earl of Sandwich, Marciano states the following:
"He is a man who is almost anonymous despite the eponymous use of his name in everyday language."
For the record, here are the definitions that lend themselves to the success of the portmanteau word: (from http://www.thefreedictionary.com)
e·pon·y·mous
adj. Of, relating to, or constituting an eponym.
ep·o·nym
n. A word or name derived from the name of a person.
a·non·y·mous
adj. Having an unknown or unacknowledged name
It really is a fun word to say. Give it a try...anonyponymous