Wiktionary
n. A member of an organization that was involved in, or whose membership commenced with, the organization's foundation.
Usage examples of "founding member".
Andor was a founding member of the Federation, and three years earlier their genetic crisis had finally been made public.
Purvis later obtained a sinecure of sorts, as a founding member of the Hell's Angels.
Caitlin knew that the names of Jao clans derived from that of their most illustrious founding member.
For example Johann Smith was a founding member of the Gibraltar Club-and I am a member, and Miss Smith's counsel, Mr.
For example Johann Smith was a founding member of the Gibraltar Club—.
Not even one who's a founding member of the South Eastern Road Racing Association.
And the blue-skinned Andorians: Even though they had been a founding member of the Federation, there apparently were rogue factions that still went in for the same kind of underhanded tactics they had been known for in pre-Federation days.