[ 'ɛpənɪm ]
■ noun a word or name derived from the name of a person.
↘a person after whom a discovery, invention, place, etc. is named.
Derivatives
~ous adjective
Origin
C19: from Gk epōnumos 'given as a name, giving one's name to someone or something', from epi 'upon' + onoma 'name'.