namesake

名词 namesake:

1. a person with the same name as another

1. She's my namesake but we're not related.
   她与我同姓，但我们不是亲戚。

name.sake

n.（名词）
One that is named after another.
同名者：根据他人的名字起名的人

来源：
From the phrase for the name`s sake
源自片语 for the name`s sake