Kieri
Kifys
Kika
Kiki
Kikki
Kikki Neko
Kikky
Kiko
Kiku
Kiku (Japanese for 'chrysanthemum')
Kila
Kilby (after Craig Kilborn of the Late, Late Show)
Killalldogs
Killashandra
Killer
Killer Cat
Killian
Killing (Danish for "kitten")
Killmouski
Kilo
Kim
Kim Chee
Kim Nuvoletta
Kim Possible (after the cartoon)
Kim The Dreaded Hamwort
Kimba
Kimbra
Kimbundu
Kimi
Kimmo