Surnames Starting with O
370 surnames
O'Leary
Calf herder
Munster24K+
O'Loane
Descendant of Luain (warrior)
Northern Ireland
O'Malley
Noble chief
Connacht8K+
O'Neill
Champion
Ulster140K+
O'Rourke
Restless one
Connacht21K+
O'Shea
Hawk-like
Munster32K+
O'Sullivan
Dark-eyed
Munster200K+
Oak
Lip or mouth, from 'oshtha'
Maharashtra1.5M+
Oakley
Clearing with oak trees
England20K+
Obadiah
Servant of God
Middle East
Obaleshwarappa
Son of Lord Obaleshwara
Shimoga400+
Obara
Both or double
Lesser Poland4K+
Obata
Small field
Japan10K+
Obdorsky
From Obdorsk in northern Siberia
Siberia500+
Obeid
Little servant of God
Lebanon
Obeidat
Small worshippers
Jordan18K+
Obeng
Born on a Tuesday
West Africa62K+
Oberdorfer
Upper village dweller
Bavaria3K+
Oberholtzer
Upper forest dweller
Switzerland
Obermann
Upper man
Germany
Oberoi
One from a high place, an Arora clan name
North India2.0M+
Obhrani
One who is overflowing (obhar - to overflow)
India (Gujarat/Rajasthan/Maharashtra)
Obi
Heart
Nigeria
Obiang
Family name
Equatorial Guinea
Obidos
From the town of Obidos
Portugal
Obinata
Belt field
Nagano1K+
Obote
Strong one
Uganda
Obregon
From Obregón
Castile
Obulreddy
A Reddy family devoted to Lord Obulesu
Andhra Pradesh150K+
Ocampo
Of the field
Galicia
Occidentalis
Of the west
Western Europe
Ochhani
One who is generous (ochh - generous)
India (Gujarat/Rajasthan/Maharashtra)
Ochion
Brother of Zion from Arabic
North Africa2K+