House Woodfort is an extinct noble house of the North. They once ruled Bear Island. It is unknown if they were sworn to the King in the North or were independent.
The Woodforts lost Bear Island to the ironborn, who conquered the island several thousand years ago. It is unclear what happened to the Woodforts, although it is presumed they were destroyed (although legend has it that the Night's King may have been a Woodfort). The King in the North, Rodrik Stark won the island in a wrestling match and gave it to his stalwart supporters, House Mormont, to rule as their own.