A number of N's and an O

NE1 N:

Nancy, Nicole, Nnika, Nina x2KS, Naomi, Nikki

Nick, Noah, Nate, Nat, Nasir

...m nathan, j naylor, f nguyen, dm nincic

and ooh, only one O:
O:
 olivia
-oliver
..odell, osbourne, oakman, odom