n. 共同继承人之一

[法] 共同继承人, 共同所有人, 土地的共同继承人

Coparcener \Co*par"ce*ner\ (-n[~e]r), n. [Pref. co- + parcener.]
(Law)
One who has an equal portion with others of an inheritance.

All the coparceners together make but one heir, and
have but one estate among them. --Blackstone.