Oscans

Oscans, a primitive people of Italy occupying Campania; were subjugated in the 5th century B.C. by the Samnites, who amalgamated with them and were subsequently incorporated with the Romans; the Oscan tongue, a cruder form of Latin, may have had its own literature, and is still extant on coins and in inscriptions.

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

Orviëto * Oscar I.
Ormonde, James Butler, Duke of
Ormuz
Ormuzd
Orontes
Orosius, Paulus
Orpheus
Orrery
Orsini, Felice
Orsova
Orviëto
Oscans
Oscar I.
Oscott
O'Shaughnessy, Arthur
Osiander, Andreas
Osiris
Osmanlis
Osmose
Osnabrück
Ossa
Ossian