founding member
noun/ˌfaʊndɪŋ ˈmembə(r)/
/ˌfaʊndɪŋ ˈmembər/
(also charter member)
(both North American English) (British English founder member)
- one of the first members of a society, an organization, etc., especially one who helped start it
（社团、组织等的）创始人，发起人，创建人