I liked
Marissa when I was younger, but now I find the sound of it to be a little harsh. Its still a nice name, though.
Suggestions...
Marissa JaneMarissa FayeMarissa HelenaMarissa MayMarissa JoanMarissa BethMarissa LeighMarissa AnneMarissa Josephine
With the exception of
Josephine, I think
Marissa sounds better with a one-syllable mn.