View the most religious surnames in Ireland

Where Does The Last Name O'Nill Come From? ^{nationality or country of origin}

O'Nill is held by more people in Australia than any other country or territory. It may appear as a variant:. Click here for other possible spellings of this last name.

How Common Is The Last Name O'Nill? ^{popularity and diffusion}

The last name is the 7,117,718^th most commonly held surname worldwide It is held by approximately 1 in 1,041,077,988 people. It occurs predominantly in Oceania, where 86 percent of O'Nill are found; 86 percent are found in Australasia and 86 percent are found in Australia and New Zealand.

The surname is most prevalent in Australia, where it is carried by 6 people, or 1 in 4,499,284. In Australia O'Nill is primarily concentrated in: Queensland, where 50 percent live and Northern Territory, where 50 percent live. Barring Australia O'Nill exists in one country. It is also found in Ireland, where 14 percent live.

O'Nill Family Population Trend ^{historical fluctuation}

The incidence of O'Nill has changed over time. In Ireland the number of people carrying the O'Nill last name declined 96 percent between 1901 and 2014.

O'Nill Last Name Statistics ^demography

The religious adherence of those carrying the last name is principally Catholic (100%) in Ireland.