Browse Names

This is a list of names in which the usage is Irish; and the first letter is O.
gender
usage
letter
Odharnait f Irish (Rare)
Derived from odar "dun-coloured, greyish brown, tan" combined with a diminutive suffix. This was the name of an early Irish saint.
Odhrán m Irish
From Old Irish Odrán, derived from odar "dun-coloured, greyish brown, tan" combined with a diminutive suffix. This was the name of a saint who travelled with Saint Columba through Scotland.
Odran m Irish
Anglicized form of Odhrán.
Oisín m Irish, Irish Mythology
Means "little deer", derived from Old Irish oss "deer, stag" combined with a diminutive suffix. In Irish legend Oisín was a warrior hero and a poet, the son of Fionn mac Cumhaill and the narrator in many of his tales.
Onóra f Irish
Irish form of Honora.
Oona f Irish, Finnish
Anglicized form of Úna, as well as a Finnish form.
Oonagh f Irish
Anglicized form of Úna.
Oran m Irish
Anglicized form of Odhrán.
Orla 1 f Irish
Anglicized form of Órlaith.
Orlagh f Irish
Anglicized form of Órlaith.
Órlaith f Irish, Old Irish
Means "golden ruler", from Old Irish ór "gold" combined with flaith "ruler, sovereign, princess". This name was borne by several medieval Irish royals, including a sister of the king Brian Boru.
Orna 1 f Irish
Anglicized form of Odharnait.
Ornat f Irish (Rare)
Anglicized form of Odharnait.
Orrin m Irish
Anglicized form of Odhrán.
Oscar m English, Irish, Portuguese (Brazilian), Italian, Swedish, Norwegian, Danish, Dutch, French, Irish Mythology
Possibly means "deer friend", derived from Old Irish oss "deer" and carae "friend". Alternatively, it may derive from the Old English name Osgar or its Old Norse cognate Ásgeirr, which may have been brought to Ireland by Viking invaders and settlers. In Irish legend Oscar was the son of the poet Oisín and the grandson of the hero Fionn mac Cumhaill.... [more]
Osheen m Irish (Rare)
Anglicized form of Oisín.
Owen 2 m Irish
Anglicized form of Eoghan.