Akshualy ... :) it was the other way around - Casa Savoia (House of Savoy - IIRC an offshot of the Guellfs, same family IIRC as that on the throne of the UK ATM) - ruled Sardinia.
LOL!
Let us not go overboard (heh - nautical pun!) with such imagery - this is the age of sail and speeds of 8-10...