Why must the name start with a “K”? That’s an arbitrary restriction the immediately removes nearly every potential name from contention.
Kinkajou (carnivorous South American raccoon-like mammal)
Koto (Japanese stringed instrument)
Kagu (long-legged bird of New Caledonia)
Kylin (Chinese mythical animal)
Kea (green parrot of New Zealand)
Kudu (African antelope with spiralling horns)