Dropping in from the Pilgrims research board. I feel your pain anon when it feels like you're the only one on the case.
use search modifiers to find exact matches and eliminate unwanted results like: "member of Le Cercle" "foreign affairs" -"des économistes"
popped up another name not on the list
Seyfi Taşhan:Founder and the Director of Foreign Policy Institute, Turkey's first political think-tank….member of Mediterranean Study Commission (Rome) and member of Le Cercle (London). As the Director of Foreign Policy Institute, Tashan attended international meetings including the Bilderberg Group.
https:// www.revolvy.com/main/index.php?s=Seyfi%20Tashan
Also don't completely discount the long dead ones, don't forget about those "born into the circle" Never would have tied A. Cooper to the Pilgrims if Vanderbuilt was ignored.