名詞 eponym:

1. the person for whom something is named
2. the name derived from a person (real or imaginary)

ep.o.nym

n.（名詞）
A person whose name is or is thought to be the source of the name of something, such as a city, country, or era. For example,Romulus is the eponym of Rome.
名祖：指姓名被或被認為用來命名某物，如城市、地區(qū)等，例如，羅穆盧斯 是 羅馬 的名祖
Medicine A name of a drug, structure, or disease based on or derived from the name of a person.
【醫(yī)學】 人名名稱：某藥品，結構或疾病因其發(fā)明或發(fā)現(xiàn)者而命名

來源：
French éponyme
法語 éponyme
from Greek epônumos [named after]
源自 希臘語 epônumos [因…命名]
epi- [epi-]
epi- [前綴，表.在…之外.]
onoma, onuma [name] * see nò-men-
onoma, onuma [名] *參見 nò-men-

【引伸】
ep.onym.ic
adj.（形容詞）