‘Dog’ in Coos

Since I was talking about cats in Quinault yesterday…

How is Coos kwīʹyos ʹdogʹ a Chinook Jargon word, as Leo Frachtenberg claims in “Coos Texts” (1913:205)?

Dog in Coos

(Image from Carol’s Pet Sitting, Coos Bay, OR)

Is that what Coos speakers thought and told him?

Is it his own idea?

It’s a stretch for my poor brain to see Chinuk Wawa kamuks in the Coos word…