This is a list of names in which the usage is Irish; and the first letter is O.
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 IrishFrom 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.
Oisín m Irish, Irish MythologyMeans
"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.
Órlaith f Irish, Old IrishMeans
"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.
Oscar m English, Irish, Portuguese (Brazilian), Italian, Swedish, Norwegian, Danish, Dutch, French, Irish MythologyPossibly 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.
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