Thank you for taking an interest in that and wanting to support us! Unfortunately, we're not adding more names currently. We might reopen it up on a small scale at some point or do a giveaway with that as a prize. But for now it's not possible to get a brand new name added. However, I can tell you that "Maria" is already one of the names that's been done, you can expect to see it when the Voiced Name feature is fully released ^^.