Octavian is a male name beginning with the letter O. Its female counterpart is Octavia. The name is used in many languages. It comes from Latin and means "member of the Roman family of Octavius". In Poland, the name Oktawian appeared for the first time in the nineteenth century.
Olgierd is one of the names beginning with the letter O, which is suitable for male gender. It is of Lithuanian origin and means "famous". It has equivalents in several languages. Olgierd's name days are February 11 and November 4. One of his diminutives is Olek.