The name Ninette is a girl's name meaning "grace". Ninette and is often added to lists like Princess Names and discussed in our forums with posts like "Girls Makeover - Two Middles".
From the experts:
Not quite Nanette and not quite Ninon, this is one of the more unusual 'ette' options. There was an eponymous Spanish film, starring Elsa Pataky, based on a novel.