View the most religious surnames in Ireland

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

The surname O'Nill occurs most in Australia. It can be found as a variant:. Click here for other potential spellings of this last name.

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

It is the 7,117,718^th most prevalent family name on a global scale It is held by around 1 in 1,041,077,988 people. The last name 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.

This surname is most frequently used in Australia, where it is carried by 6 people, or 1 in 4,499,284. In Australia O'Nill is most prevalent in: Queensland, where 50 percent live and Northern Territory, where 50 percent live. Other than Australia O'Nill occurs in one country. It also occurs 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 share of the population with the last name contracted 96 percent between 1901 and 2014.

O'Nill Last Name Statistics ^demography

The religious adherence of those holding the O'Nill last name is primarily Catholic (100%) in Ireland.