Browsing Wikipedia (I know) the other day, I came across the page for the British actress Carolyn Seymour. The page in question states that she was born Carolyn von Benckendorf (note that this is only with one f) to a Russian father and an Irish mother.
I know that there was a famous Baltic German family, in Russian service, of a very similar name, of whom Alexander von Benckendorff (note the double f) was probably the most illustrious member. Does Carolyn Seymour come from this family? (I've not been able to unearth anything, either for or against, myself.)