The name Maxima is a girl's name of Latin origin. Maxima and is often added to lists like Badass Princess Names and discussed in our forums with posts like "Girls Makeover - Two Middles".
From the experts:
Maxima -- or indeed any of the feminine Max variations such as Maxine -- just don't have the earthy-yet-stylish elan of Max. Name your daughter Maxima if you must, but just don't make her middle name Nissan.