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 is more frequently found in Australia than any other country or territory. It may also be found as:. Click here for other possible spellings of this last name.

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

This surname is the 7,117,718^th most prevalent surname at a global level, held by around 1 in 1,041,077,988 people. This surname is mostly found 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 last name O'Nill is most widely held in Australia, where it is carried by 6 people, or 1 in 4,499,284. In Australia O'Nill is mostly concentrated in: Queensland, where 50 percent live and Northern Territory, where 50 percent live. Excluding Australia it 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 share of the population with the last name fell 96 percent between 1901 and 2014.

O'Nill Last Name Statistics ^demography

The religious devotion of those bearing the O'Nill surname is principally Catholic (100%) in Ireland.