While Marietta is not a name I would ever use and isn't really my style, I would very much like to see it on someone else's daughter.
For me it was very clear that the three combos with the best flow are
Marietta Clarisse
Marietta Lucille
Marietta June
Maybe this is ireelevant, but Marietta reminds me of Henrietta. Another name that I think is adorable, even if I would never use it myself.