[name_f]My[/name_f] Instinctive Pronunciations
[name_u]Marian[/name_u] → ma-ree-un
[name_f]Marianne[/name_f] → ma-ree-anne
[name_f]Mariana[/name_f] → ma-ree-ar-nuh
[name_f]Marianna[/name_f] → ma-ree-ar-nuh or ma-ree-ann-uh
making sense of my pronunciations
because I know it can be confusing and I’m bad at writing sounds 
ma → like the sound in map or **Ma*tt
ree → rhyming with bee
ar → like the sound in Arthur or **ar*t (or like the [name_f]Anna[/name_f] in Frozen)
ann-uh → like in **Anna*bel or [name_u]Anne[/name_u] with an uh sound
[name_f]Do[/name_f] I pronounce [name_u]Marian[/name_u] and Marianne/Marianna and [name_f]Mariana[/name_f] the same?
No, not instinctively, however, I wouldn’t be surprised if someone did? I’d just correct my pronunciation.
Vibes and imagery etc
[name_u]Marian[/name_u] → literary feeing and refined; distinctive and concise; I like the solid, no fuss vibes
[name_f]Marianne[/name_f] → literary, slightly elegant and slightly grander, sleek, a tiny bit posh? but strong and sort of poetic
[name_f]Mariana[/name_f] → it’s got a bit of flair and elegance, quite sunny, but it also reminds me of pasta sauce? (I would get over that if I met one)
[name_f]Marianna[/name_f] → similar to above, I get mostly the same feel
[name_u]Marian[/name_u] is my fave