It's a member of the 24th-century paramilitary organization-terrorist group of the same name of course! Notable members will include Laren, Torres, Chakotay, and even one of the Riker twins.
I stopped actually reading your post when I realized I just wanted to make the Star Trek joke but then I realized I was actually in fact reading the Star Trek joke.
I just watched a YouTube video today about Ben Sisko and his fighting the Marquis and how my current views have made me dislike him and his actions. He had overtaken Picard as my favorite but I think I'm back to Picard being my number one favorite captain.
A marquess (UK: /ˈmɑː(r)kwɪs/;[1] French: marquis [maʁki])[2][a] is a nobleman of high hereditary rank in various European peerages and in those of some of their former colonies. The German language equivalent is Markgraf (margrave). A woman with the rank of a marquess or the wife (or widow) of a marquess is a marchioness or marquise. These titles are also used to translate equivalent Asian styles, as in Imperial China and Imperial Japan.
In Great Britain and historically in Ireland, a marquess ranks below a duke and above an earl. A woman with the rank of a marquess, or the wife of a marquess, is a marchioness /ˌmɑːrʃəˈnɛs/.[3] The dignity, rank, or position of the title is a marquisate or marquessate.
Bud, the US literally outlawed aristocratic titles. And good riddance to them. The only time a US citizen sees a word like 'marquis' is in a world history class in college.