O’Cairbre, Dairmaid


O Flaithearta, Liam


O’Neill clan, Ireland


Oakbank crannog


Ogilvy, James


oil industry


Oliphant, Sir William


Oliphant family


Ordinances of 1305


Orkney


Alexander II


Croune of Orkney


Gurness


Haakon IV, King of Norway


James III, of Scotland, claimed by


Maes Howe


Papa Westray, Knap of Howar


Skara Brae


Viking invaders


Orkney, Henry Sinclair, Earl of


Orléans, Phillipe, Duc d’


Ormsby, William