Yes, given they are not married. I know for fact that if you are only 15 and an assistant karate instructor or an assistant dance instructor, students will call you Ms. {Lastname}
Sir Miles Messervy
You don't . Ms. is a designation only for a woman who is single, marital status unknown, or a lady who has indicated this is how she prefers to be addressed . MS would only be appropriate for MS Magazine , if you are writing to them, or a company who incorporates MS into it's business name .
No, lawyers are not typically addressed as "Dr." when speaking to them formally. They are usually addressed as "Mr." or "Ms." followed by their last name.
Ms. Scarlet
Apparently, Ms. Keane's full name is never told in the series. Perhaps it was, but Wikipedia doesn't have the name then.
The property salutation for two women sharing the same last name can be addressed as "Ms. [Last Name] and Ms. [Last Name]" or "Ms. [Last Name] & Ms. [Last Name]." If they are in a more formal context, you might also use "The Misses [Last Name]." The choice often depends on their preference and the level of formality required.
Ms
A member of provincial Parliament is typically addressed as "Member" followed by their last name or "Honorable" if they hold a title. In formal settings, you can also use "Mr.", "Ms.", or "Dr." followed by their last name. In written correspondence, begin with "Dear [Title] [Last Name]." When speaking to them directly, "Member [Last Name]" or simply "Sir" or "Madam" can be used.
You can address the CO as "Sir" or "Ma'am" as the case may be, but you can also address them by rank, or rank/name (e.g., Good Morning Captain/Colonel/Colonel Smith/Captain Jones, etc.). In the Navy, the CO of a unit, regardless of rank, is typically addressed as "Captain", a reference to the Officer's CO status rather than rank. This is more formal when the Officer is a Junior Officer but the CO; JO's are typically addressed as "Mister" or "Ms", but their status as CO of a unit requires that the Officer be addressed more formally.
A widow can be formally addressed as "Mrs." followed by her late husband's last name, for example, "Mrs. Smith." In cases where she prefers to use her own first name, you may address her as "Ms." followed by her last name, such as "Ms. Johnson." It’s always best to follow her preference if you are aware of it. If in doubt, using "Ms." is generally considered respectful and neutral.
The proper salutation in a letter addressed to two professional women is "Dear Ms. [Last Name] and Ms. [Last Name]," if they have the same last name or "Dear Ms. [Last Name] and Dr. [Last Name]," if one holds a doctorate. It’s important to use their preferred titles and last names to maintain professionalism. If you are unsure of their titles, "Dear [First Name] [Last Name] and [First Name] [Last Name]" is also acceptable.
Madam is appropriate only when you know the recipient is a female but her name is not known.If you know that the recipient is a woman and you know her last name, use the term Ms. The marital status of the recipient is not appropriate and is irrelevant.If you are making a generic response when you are not sure who will receive it, then you Dear Sir/Madam or Dear Sir or Madam.