Pale green, sallow, or of a pale complexion — rooted in the Old Irish word "odhar," describing a grey-green or dun colour, often associated with the natural, earthy tones of the Irish landscape.
Odin
The All-Father, god of wisdom and war in Norse mythology
Odis
Warrior's leader
Odysseas
wanderer, traveler, of Homer
Odysseus
Gifted wanderer
Oisín
little deer, fawn
Olaf
From Old Norse anu (ancestor, forebear) and leifr (heir, descendant, relic), Olaf means "ancestor's heir" or "heir of the forebears." It was a name built to honor lineage and carry a family legacy forward.
Olen
Strong and noble
Olin
Strong and noble
Oliver
Olive tree, from the Old French Olivier and Latin olivarius.
Olivier
olive tree, peace
Ollie
Elegant leader
Omar
long life
Omari
My companion
Omer
sheaf of grain
Onesimus
inventive, industrious
Oran
pale green or little pale one
Oren
pine tree, fir tree
Orestes
manly, handsome
Orin
God is my strength
Oriol
Golden eagle
Orion
Hunter, giant in Greek mythology
Orlando
Famous in the land
Oron
Mountain peak
Orpheus
Mourner of love
Orson
Gifted leader
Orval
Ruler's valley
Orville
Swift traveler
Oscar
Divine gift
Osiris
Egyptian god of the afterlife and fertility
Oskar
Divine crown
Osman
Life
Osric
God is ruler
Osvaldo
Wise ruler
Oswald
Divine ruler
Otha
He who helps
Otis
Possibly derived from the Old English word 'ot' meaning 'hearing'
Otto
wealthy, prosperous
Owen
Owen means 'young warrior' or 'well-born,' derived from the Welsh name Owain, which itself likely traces back to the Latin Eugenius meaning 'well-born' or the Celtic word for 'youth.' It combines a sense of nobility with an energetic, youthful quality.