Good question. Here's what I found.

eponym


n 1: the name of a person for whom something is supposedly named; "Constantine I is the eponym for Constantinople" 2: a name derived from the name of person (real or imaginary) as the name of Alexandria is derived from the name of its founder: Alexander the Great


Source: WordNet ® 2.0, © 2003 Princeton University
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(emphasis added)

Last edited by inselpeter; 10/14/2005 8:13 PM.