Along on the Dieppe raid was Lucian Truscott Jr., who later was involved in managing the Jefferson estate (his wife was a descendant of Thomas Jefferson).
His grandson, JKT IV was involved in inviting black descendants of the family to the reunions. I think the jury is still out on whether any of the black descendants are actually descended from Jefferson himself (rather than from Randolph Jefferson, say) but certainly LKT Jr. had a strong appreciation of the Canadians, and regretted the necessity (but held that it was a necessity) to pay in blood to learn how to conduct amphibious operations against a continent.