I met a lady who is from (now i'm not sure of how to express myself here) a french noble family - the kind that would be listed in Who's Who in the UK. I don't know if this makes any difference on how to address the letter....
She is a widow - in the UK that would make the letter to "Firstname Surname de Ville" - because (in the UK) you wouldn't write "Mrs Firstname Surname" unless Firstname was the husband's first name. I know that a lot of people in the UK do, but it's not correct, believe me.
E.g. (in the UK), it is correct to write "Mrs Peter Smith", but not "Mrs Jane Smith". I believe that if Jane Smith were widowed, one would write to "Mrs Smith", or "Jane Smith" - but not "Mrs Jane Smith".
What should I do here? And the fact that this lady's family is "noble" and is a "de Ville" type name - does this make any difference?
I'm not suggesting this lady is a snob who takes offence easily - in fact she's warm and friendly and quite the reverse. However, she is very elderly and I'd like to treat her with respect!
Any help well received