daddypa
Flocko
Floella
Floor
Floozy
Flop
Flopper
Flopper Bopper
Flopsy
Flora Or Fauna
Florence (after Florence Nightingale)
Florénda
Florida
Florida Kitty
Florrie O'Driscoll
Flossy
Flounder
Flower
Flower Face
Flowerbelle
Floyd (after Pink Floyd)
Floydean
Flubbadubba
Flubberty
Fluff
Fluff Ball
Fluff Napoleon
Fluffee
Fluffer Kitty
Fluffer Kitty McNickles
Fluffernutter