Constance Crowninshield Coolidge, was a Boston Brahmin, socialite, heiress and a long-term American expatriate living in Paris. She had the pedigree of the most elite Boston Brahmin: she was a descendant of the Adams, Amory, Coolidge, Copley, Crowninshield, and Peabody families, all of them well-known in Boston's high society. She was a distant relative of Calvin Coolidge.

The Crowninshield family is an American family that has been prominent in seafaring, political and military leadership, and the literary world. The founder of the American family emigrated from what is now Germany in the 17th century. The family is one of several known collectively as Boston Brahmins.