I've always liked it. I like the -inta ending. I also like the sound of -raminta.
It's a little stuffy though, which is why I wouldn't use it. I imagine everyone knowing her as
Minnie or
Mindy, and people laughing when they find out that it's short for "
Araminta!" Shame, because I think it's really lovely. Long names don't fare well in this day and age - unless there's no obvious nickname.