I love the name
Mary, it is beautiful yet understated.
My favorite combos from your list...
Mary RosalindMary ClemenceMary FlorenceMary Clementine
I also love...
Mary GeorginaMary ElisabethMary BeatriceMary JulietMary SusannahMary Violet
Polly would be my chosen nickname out of the three above. However my favorite nickname for
Mary is
Malle.