Finnøy was at the top of its power in the middle of the fourteenth century when the King's representative Ogmund Finnsson had his seat at Hesby on the west side of the island of Finnøy.
Finnøy berada di puncak kekuasaanya pada pertengahan abad ke-14 saat perwakilan raja Ogmund Finnson berkursi di Hesby, sisi barat pulau Finnøy.