OBERON (m) Form of AUBERON.

OBI (m) "heart" (African)

OCTAVIA (f) "eighth" (Latin).

ODELL (m) "woad hill" (Old English). From a surname or a place name. A woad is a herb used for dying.

ODETTE (f) French pet form of ODILA

ODILA (f) "wealth" (Teutonic).

ODILON (m) Masculine form of ODILA

ODYSSEUS (m) Perhaps "the hateful one" or "wounded in the thigh" (Greek).

OFER (m) Form of OPHRAH

OFRA (f) Form of OPHRAH

OISIN (m) "little deer" from Irish os "deer" and a diminutive suffix.

OKSANA (f) Russian form of XENIA

OLAF (m) "ancestor descendent" from Old Norse anu "ancestor" and leifr "descendent".

OLEG (m) Russian form of HELGE.

OLGA (f) Russian form of HELGE.

OLIVE (f) French feminine form of OLIVER

OLIVER (m) "olive tree" (French). The olive tree was an emblem of peace.

OLIVIA (f) Feminine form of OLIVER.

OLIVIER (m) French form of OLIVER

OLLIE (m) Short form of OLIVER

OLWYN (f) "white footprint" (Welsh).

OLYMPIA (f) Meaning unknown. From the Greek Olympus, the name of the mountain home of the Greek gods.

OMAR (m) Form of UMAR.

ONDREJ (m) Slovak form of ANDREW

OONAGH (f) Form of UNA

OPAL (f) "precious stone" from Sanskrit upala. From the name of the iridescent gemstone, which is the birthstone of October.

OPHELIA (f) "help" (Greek).

OPHRAH (f,m) "fawn" (Hebrew).

OPRAH (f) Form of OPHRAH

ORA (f) "pray" (Latin)

ORBRA (m,f) Possibly "toll bridge" (Swedish)

OREN (m) "tree" (Hebrew)

ORIANA (f) "gold" (Spanish).

ORINDA (f) Possibly a form of ORRIN or possibly "fire serpent" (Teutonic).

ORION (m) Meaning unknown (Greek), possibly "son of light". The name of a constellation, which gets it's name from a legendary Greek hunter killed by a scorpion sent by Artemis.

ORIS (m) Probably an early form of HORACE

ORLANDO (m) Form of ROLAND.

ORMOND (m) From the Irish surname Ó Ruaidh which means "descendent of Ruadh". Ruadh means "red" in Gaelic.

ORMONDA (f) Feminine form of ORMOND

ORNELLA (f) "flowering ash tree" (Italian)

ORRIN (m) Perhaps from the Greek name Orestes, which means "mountain".

ORSON (m) "bear" (French). Ultimately from Latin ursus "bear".

ORVILLE (m) Meaning unknown.

OSBORN (m) "god bear" from Old English os "god" and beorn "bear".

OSCAR (m) "god spear" from Old English os "god" and gar "spear".

OSMAN (m) Form of UTHMAN.

OSMOND (m) "god protector" from Old English os "god" and mund "protector".

OSSIAN (m) Form of OISIN

OSVALDO (m) Spanish and Italian form of OSWALD

OSWALD (m) "god rule" from Old English os "god" and wald "rule".

OSWIN (m) "god friend" from Old English os "god" and wine "friend".

OTIS (m) "son of Ote" (Teutonic). From a surname. The name Ote may be related to OTTO

OTTILA (f) Variant of ODILA

OTTO (m) "wealthy" (Teutonic).

OVE (m) Short form of names that contain the Old Norse element ag "blade".

OVID (m) "sheep" (Latin).

OWEN (m) This name can have several different meanings. It can be a Welsh form of EUGENE. Others believe that it is derived from either of the Welsh elements oen "lamb" or eoghunn "youth", or that it is related to Esos, which was the name of a Celtic god. This name can also function as an Anglicized Irish form of EOGHAN.

OXANA (f) Russian form of XENIA.