eponym
Concise Oxford English Dictionary © 2008 Oxford University Press:
eponym /ˈɛpənɪm/
▶noun a word or name derived from the name of a person.
■ a person after whom a discovery, invention, place, etc. is named.
– derivatives
eponymous adjective.
eponymous adjective.
– origin C19: from Gk epōnumos ‘given as a name, giving one's name to someone or something’, from epi ‘upon’ + onoma ‘name’.
'eponym' also found in these Oxford entries:

