Lestat: Marius, look at this.
Marius: “Mah-rius.”
Lestat: What?
Marius: My name– it is pronounced “Mah-rius.” You called me ‘Marry-iss.”
Lestat: What’s the difference?
Marius: One is my name; the other is not.
Lestat: *grumbles* Oh shut up old man.
[X]

[^Lee Pace as Thranduil, has a Marius vibe here, at least physically]
I’m not even going there re: you wanting to MARRY him bc he is one of our more insidiously Problematic characters. @anton-mordrid had a good write-up about him here.
The pronunciation of his name is up for some debate; it isn’t explicitly defined in canon. Les Mis fandom ppl – who also have a Marius in their canon – tend to pronounce it “MAHR-eeus” with more emphasis on the first syllable.
I’m not a scholar on Roman history, either, so someone who is can chime in on this, bc it would probably be that way. I’ve always pronounced his name “Marry-iss” which I’m sure is totally wrong, but sounds right to me 😛