I visited Frisco in '78 but the family history goes back to Frisco. My great grandfather was a deep sea sailor in the Pacific and Frisco was the port where they docked. He also worked on a riverboat steamer in Sacramento after that. Magnus Johnson is on my profile page. Not a pirate himself, but I'm sure he met some pretty savory characters sailing the Pacific as a young guy.
We've got a Fresno great grandfather of another freeper too who had a very colorful life. The photos are worth a look see. Mercenary Maid, Skaner Swede Stock