daddypa
FBI Special Agent Kat
Fearful
Fearless
Fearless Fosdick
Fearless J. Mousebiter
Feather
Feather Boy
Febian
Fedia
Fedor
Fedora
Fedosia
Fedot
Fee-cat
Feedback
Feester
Feetee
Fefe
Feifel
Feisty
Fela
Feldmann
Feles
Felice (combination of Faith and Elise, meaning Joy)
Felicia
Felicicat
Felicity
Felicja
Felidae (lions, tigers, cats and others are members of the Felidae (feline) family)
Felina