eponym

the name of a person for whom something is supposedly named; Constantine I is the eponym for Constantinople.

被命名为某物人名；君士坦丁堡与君士坦丁一世齐名。

The introduction is mainly about the definition of eponym, and emphasizing its development and synchrony with language.

前言主要是名祖名词，阐述名祖名词发展和存在现状，并强调了名祖名词始终与语言发展共时。