Whew, St. Clair/Sinclair?
https://www.scotweb.co.uk/info/sinclair/
https://www.scotsman.com/lifestyle/from-st-clair-to-sinclair-the-family-who-built-rosslyn-1-466489
BUT have a look at this for more recent history:
https://www.forbes.com/sites/maddieberg/2018/05/02/meet-the-billionaire-clan-behind-the-media-outlet-liberals-love-to-hate/#41b6efcd4284
This is like 15 generations of family accomplishment and wealth accumulation, with a number of notable intellectuals, some scoundrels, and a few outright criminals. They're a very colorful lot.
https://www.thedailybeast.com/dominique-strauss-kahns-rich-wife-how-anne-sinclair-acquired-her-fortune
https://professorelliot.wordpress.com/2009/08/16/who-is-john-quincy-st-clair/
https://steemit.com/history/@scubasteve/who-is-inventor-john-quincy-st-clair