Olaüs

Olaüs, the name of three early kings of Sweden and of five of Norway, who figured more or less in the history of their respective countries.

Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)

Olaf, St. * Olbers, Heinrich
[wait for the fun]
Ohio River
Ohm, Georg Simon
Ohnet, Georges
Oil City
Oka
Oken, Lorenz
Okhotsk, Sea of
Oklahoma
Okuma, Count
Olaf, St.
Olaüs
Olbers, Heinrich
Old Bailey
Old Catholics
Old Man of the Mountain
Old Man of the Sea
Old Mortality
Old Noll
Oldbuck, Jonathan
Oldbury
Oldcastle, Sir John