Surnames Starting with O: Coat of Arms & Last Name Origins

Descendant of Brian Boru

A grandson of little Ceallach (war or strife)

A grandson of little Ceallach (war or strife)

Descendant of Conchobhar

Descendant of Domhnall ("world mighty")

Descendant of Donnchadh ("brown warrior")

Descendant of Eidirsceól ("interpreter")

A descendant of Duibhidhir (black Odhar)

Descendant of Flaithbheartach ("bright ruler")

Descendant of Grádaigh ("noble, illustrious")

A grandson of Allmhuran (stranger from beyond the sea)

Descendant of Eaghra

A grandson of Ir (origin obscure)

Descendant of Caomh

Descendant of Caomh ("gentle")

Descendant of Laoghaire ("calf herder")

Descendant of Máille

Descendant of Niall

Descendant of Niall

Descendant of the royal poet

Descendant of Ruarc

A descendant of the servant of the queen

A grandson of Seaghdha (majestic or learned)

Descendant of Tuathal ("ruler of the people")

One who lived by oak trees

Oak clearing

Son of Odo

Someone who came from Oberlind (upper linden, tree)

The field

"wolf" (Basque)

A nickname from the ox, or a cattle keeper

Woad hill

Son-in-law

Oak valley

High plain

High plain

Ocga's hill

Gardener

From Ojeda

From Okonin

Someone from Oldenburg, old fortification

A dweller near the old field

From Oldham, in Lancashire

Son of the oil presser

"oil presser"

From Oleksin / of Alexis

Oleksy / Alexius

Elephant

Someone who grew or sold olives

Olive groves

Olives

Olive tree

From the personal name Oliver

A personal name, olive tree, or Spanish place

Little olive grove

Olive tree

Son of Oliviero

Elm grove

Elms

Son of Ole (Olaf)

Son of Olaf

From Olszewo, place of alders

From Olvera

Of Onofrio

Ondsla's mound

From Ontiveros

Little Albrecht

Someone who came from Oppenheim (Oppo's place) in Germany

A dweller at the homestead on the river bank

Someone who came from Orange (town on the river Araise)

Son of Ordoño

From Orellana

From Orlando (Roland)

Famous land (Roland)

"eagle"

"Orm's clearing"

Orm's farm

From Ornelas

From Orozko in Biscay

Dun, sallow

Someone who came from Orrock, in Fife

"little bear"

Nettle; grouse

Someone from Orth or a place at a corner

Son of Orti / Fortunio

Upper farm

From the place of nut trees

God bear

God Gaut

"aspen grove"

From an old personal name

Easter or east man

From Ostrów, river island

From the name Oswald

"hillock"

A descendant of Otes, a form of Odo

Wealth (short form)

Son of Ottaviano

Wealth, prosperity

Little Hoel

Hillock

A dweller on the bank of a river

Beyond the road

Farm on the ridge

Shepherd

Son of Owen (Owain)

Ford for oxen

Ox pasture