| NAME | MEANING
|
| OALO | Small
|
| OBADIAH | Servant of God
|
| OBED | Servant of God
|
| OBERON | Noble bear-like
|
| OBIE | Servant of God
|
| OCEAN | Ocean
|
| OCEANUS | Ocean
|
| OCTAVIUS | Eighth
|
| ODE | Wood hill
|
| ODELL | Rich protector
|
| ODI | Rich protector
|
| ODIE | Wood hill
|
| ODIN | A name of a chief Norse God
|
| ODINAN | Fifteenth-born child
|
| ODION | First born twin
|
| ODISSAN | Thirteenth born son
|
| ODO | Possessions
|
| ÖDÖN | Rich protector
|
| OGDEN | Oak valley
|
| OGUN | Name of a War God
|
| OGUNKEYE | Ogun has earned honor
|
| OGUNSANWO | Ogun Helps
|
| OGUNSHEYE | Ogun performed honorably
|
| OHANKO | Reckless
|
| OHANNES | God has been gracious
|
| OHIN | Chief
|
| OKO | Name of a War God
|
| OKON | Born at night
|
| OLAF | Patron saint of Norway
|
| OLAFUR | Patron saint of Norway
|
| OLAV | Patron saint of Norway
|
| OLAVE | Patron saint of Norway
|
| OLAVUS | Patron saint of Norway
|
| OLAY | Patron saint of Norway
|
| OLE | Patron saint of Norway
|
| OLEF | Patron saint of Norway
|
| OLEK | Defender of men
|
| OLEKSANDR | Defender of men
|
| OLERY | Ruler of all
|
| OLÉS | Defender of men
|
| OLESKO | Defender of men
|
| OLIN | Patron saint of Norway
|
| OLINDO | A Greek city
|
| OLIVER | The name of a fruit
|
| OLIVIER | The name of a fruit
|
| OLLE | Forefather
|
| OLLIE | The name of a fruit
|
| OLNEY | meaning unknown
|
| OLO | Famous land
|
| OLORUN | Belonging to god of Olorun
|
| OLOV | Patron saint of Norway
|
| OLUF | Patron saint of Norway
|
| OLUFEMI | Gods loves me
|
| OLUJIMI | God gave me this
|
| OLUKAYODE | God brings me happiness
|
| OLUSHEGUN | God is the victor
|
| OLUSHOLA | God has blessed me
|
| OMAR | Genesis 36:11
|
| OMER | Genesis 36:11
|
| ONAN | Prosperous
|
| ONANI | Look
|
| ONDRO | Manly
|
| ONEK | Possessions
|
| ONUR | Dignity
|
| OPANAS | Immortal
|
| ORAN | Green
|
| ORBÁN | One from the city
|
| ORLANDO | Famous land
|
| OREN | Ash tree
|
| ORESTES | Mountain
|
| ORIN | Mountain
|
| ORION | Dawn
|
| ORJI | Mighty tree
|
| ORLAND | Famous land
|
| ORLANDO | Famous land
|
| ORLO | Famous land
|
| ORMAND | Army man
|
| ORMEROD | meaning unknown
|
| ORMOND | Red
|
| ORMROD | meaning unknown
|
| ORRIN | meaning unknown
|
| ORRIS | meaning unknown
|
| ORSINO | Little bear
|
| ORSON | Little bear
|
| ORUNJAN | God of the midday sun
|
| ORVAL | meaning unknown
|
| ORVILLE | Gold Town
|
| OSBERN | meaning unknown
|
| OSBERT | God bright
|
| OSBON | meaning unknown
|
| OSBORNE | meaning unknown
|
| OSBURN | meaning unknown
|
| OSCAR | God-spear
|
| OSGOOD | Divinely good
|
| OSIP | God will add
|
| OSMAN | God protector
|
| OSMANEK | God protector
|
| OSMEN | God protector
|
| OSMOND | God protector
|
| OSMUNDO | God protector
|
| OSTEN | Venerable
|
| OSWALD | God power
|
| OSWELL | God power
|
| OSWIN | God friend
|
| OSYA | God will add
|
| OTADAN | Plenty
|
| OTEK | Possessions
|
| OTELLO | Possessions
|
| OTFRIED | Possessions
|
| OTHO | Possessions
|
| OTHON | Possessions
|
| OTIK | Possessions
|
| OTILIO | Possessions
|
| OTIS | Possessions
|
| OTMAN | Possessions
|
| OTO | Possessions
|
| OTÓN | Possessions
|
| OTTAH | Thin one
|
| OTTO | Possessions
|
| OTTOCAR | Possessions
|
| OTTOMAR | Possessions
|
| OTTON | Possessions
|
| OTTONE | Possessions
|
| OURAY | Arrow
|
| OWAIN | Well born
|
| OWEN | Well born
|
| OXFORD | Where the oxen cross the river
|
| OZ | Divinely good
|
| OZZY | Divinely good
|