Names I Would Actually Use

• Oakley: from old English meaning 'oak meadow'.
• Oscar: possibly means 'deer lover'; derived from Gaelic os 'deer' and cara 'lover'. Alternatively, it may derive from the Old English name Osgar (derived from the Old English elements os 'god' and gar 'spear') or its Old Norse cognate Ásgeirr (Old Norse form of Asger; derived from the elements áss meaning 'god' and geirr meaning 'spear') which may have been brought to Ireland by Viking invaders and settlers.
• Otto: a later German form of Audo or Odo; originally a short form of various names beginning with the Germanic element od meaning 'wealth, fortune'.
• Owain, Owen: probably a Welsh form of Eugene, although it might be derived from Welsh eoghunn meaning 'youth.

Guilty Pleasure

• Octavius: a Roman family name meaning 'eighth' from Latin octavus.
• Odin: anglicized form of Old Norse Óðinn which was derived from óðr 'inspiration, rage, frenzy'. In Norse mythology Odin was the highest of the gods, presiding over art, war, wisdom and death. He resided in Valhalla, where warriors went after they were slain.
• Odysseus: possibly derived from Greek odyssomai 'to hate'.
• Oliver: from Olivier, a Norman French form of a Germanic name such as Alfher (Germanic name composed of the elements alf 'elf' and hari 'army, warrior') or an Old Norse name such as Áleifr (Olaf; from the Old Norse name Áleifr meaning 'ancestor's descendent', derived from the elements anu 'ancestor' and leifr 'descendent'). The spelling was altered by association with Latin oliva 'olive tree'.
• Olympiakos: the name of a Greek football team. Assuming it is a form of Olympos; from a Greek personal name which was derived from the place name Olympos, the name of the mountain home of the Greek gods. The meaning is unknown.
• Orlando: Italian form of Roland; means 'famous land' from the Germanic elements hrod 'fame' and 'land'.
• Orson: a surname name; originally a nickname meaning 'bear cub' from a diminutive of Norman French ors 'bear'; ultimately from Latin ursus.