Isabella /
Isabel nn
Izzy (
Izzy sounds too cutesy and immature)
Angelina nn
Angie (
Angie sounds kind of girl-next door)
Alexandra /
Alexis nn
Alex (something about a girl
Alex seems different than the vibe I get from these two full feminine names)
Cynthia nn
Cindy (
Cindy sounds so middle-aged housewife,
Cynthia sounds beautiful and sophisticated at any age)
Catherine nn
Cathy (ditto)