Why is the late Paul Allen’s superyacht the “Breast” in Chinook?

Sure, he was a Seattle billionaire; did he ask someone to find a Chinook Jargon word for ‘beast’?

allen tatoosh

Image credit: dirt.com

The article at Dirt.com makes linguistically untrustworthy claims about the name.

Anyone here know more?

qʰata mayka təmtəm?
What do you know?