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 also occur as:. Click here to see 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 last name on earth. It is borne by around 1 in 1,041,077,988 people. The surname occurs predominantly in Oceania, where 86 percent of O'Nill reside; 86 percent reside in Australasia and 86 percent reside in Australia and New Zealand.

O'Nill is most commonly used in Australia, where it is held by 6 people, or 1 in 4,499,284. In Australia O'Nill is mostly concentrated in: Queensland, where 50 percent are found and Northern Territory, where 50 percent are found. Other than Australia this last name occurs in one country. It is also found in Ireland, where 14 percent are found.

O'Nill Family Population Trend ^{historical fluctuation}

The frequency of O'Nill has changed over time. In Ireland the number of people bearing the O'Nill last name decreased 96 percent between 1901 and 2014.

O'Nill Last Name Statistics ^demography

The religious adherence of those carrying the surname is predominantly Catholic (100%) in Ireland.