Surnames starting with the letter O

List of surnames

These last names have appeared during the ancestry investigations carried out for our clients, so that the list is constantly updated.

Contact us for more information on any surname that is or is not on the list.

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O'Neale
Oar
Oarriz
Obejero
Obregón
Obón
Oca
Ocafrain
Ocampo
Ocaña
Ochando
Ochoa
Odena
Odria
Odriozola
Ogayar
Oguiñena
Oiarvide
Ojanguren
Ojeda
Ojedo
Olabarri
Olabarria
Olabarrieta
Olabezela
Olaechea
Olaeta
Olaguenaga
Olagüe
Olalla
Olano
Olaran
Olarte
Olartecoechea
Olaso
Olavarría
Olaya
Olazabal
Olazaguirre
Olbrich
Olea
Olias
Olibares
Olid
Oliete
Oliva
Olivares
Olivart
Olivas
Olivella
Oliver
Olivera
Oliveras
Olivé
Oller
Olleta
Ollo
Olloquiegui
Ollé
Olmedilla
Olmedo
Olmo
Olmos
Olona
Oltra
Olvera
Omedes
Omené
Onaindia
Oncinos
Oncins
Ondiviela
Onieva
Onrubia
Ontiñano
Ontoria
Oquiñena
Oquéluri
Ora
Orbegozo
Orbezu
Orbiso
Orcajo
Ordeix
Ordiñola
Ordoña
Ordoñana
Orduña
Ordás
Ordóñez
Oreja
Orejón
Orellana
Orenich
Orgaz
Oria
Oribe
Orihuela
Oriol
Oriols
Oriozavala
Orive
Orleans
Ormaechea
Ornat
Ornilla
Ornillos
Orosco
Orozco
Orra
Orriach
Orries
Orriols
Orta
Ortal
Orte
Ortega
Ortego
Orteu
Ortiz
Orts
Ortuño
Ortí
Ortín
Orueta
Oruezabal
Osa
Osanz
Oseguera
Oses
Osinaga
Oso
Osorio
Osoro
Ossatnik
Osses
Ossoro
Ostolaza
Osuna
Otaegui
Otal
Otamendi
Otaolea
Otaño
Otegui
Oteiza
Oterino
Otero
Oteros
Ots
Otón
Oubiña
Outeda
Outeiral
Outeyro
Ovejas
Ovejero
Oviedo
Oyanguren
Oyarvide
Oyarzun
Oyarzábal
Oyo
Oyos
Ozamiz
Oñate
Oñativia
Oñederra
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