View the most religious surnames in Ireland

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

The last name O'Nill occurs in Australia more than any other country or territory. It can 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 surname O'Nill is the 7,117,718^th most commonly held last name worldwide It is held by approximately 1 in 1,041,077,988 people. The last name is primarily found in Oceania, where 86 percent of O'Nill live; 86 percent live in Australasia and 86 percent live in Australia and New Zealand.

O'Nill is most frequent in Australia, where it is borne by 6 people, or 1 in 4,499,284. In Australia it is most prevalent in: Queensland, where 50 percent live and Northern Territory, where 50 percent live. Aside from Australia O'Nill is found in one country. It is also common in Ireland, where 14 percent live.

O'Nill Family Population Trend ^{historical fluctuation}

The incidence of O'Nill has changed through the years. In Ireland the number of people carrying the O'Nill last name decreased 96 percent between 1901 and 2014.

O'Nill Last Name Statistics ^demography

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