I'm undecided. It does have an unassuming retro cuteness to it that appeals to me on an imagery level. But the sound of the name is actually unattractive I think. I know of one whose full name is Marnina. The
Marnie on GIRLS is so opposite of how I previously envisioned a bearer of
Marnie to be, that it made me like the name more somehow. It previously felt so meaningless and trivial that it was like a silly joke in name form, but
Marnie on GIRLS is so prim and serious that the character gave the name
Marnie some real weight, IMO.