Lots of ideas already - [name_f]Mittie[/name_f] is very sweet!
For some new ones:
[name_f]Remi[/name_f], [name_f]Rita[/name_f], [name_f]Mitsy[/name_f] or [name_f]Tria[/name_f]
And really out there: [name_m]Leaf[/name_m] or Leaves (from the tree sound. I’ve heard of an [name_f]Autumn[/name_f] nn Leaves)