View the most religious surnames in Ireland

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

The last name O'Nil is found most frequently in The United States. It can be rendered as a variant:. Click here to see other possible spellings of this last name.

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

This surname is the 7,593,402^nd most prevalent last name throughout the world. It is borne by approximately 1 in 1,214,590,986 people. This surname occurs predominantly in The Americas, where 67 percent of O'Nil reside; 50 percent reside in North America and 33 percent reside in Anglo-North America. It is also the 4,548,448^th most widely held first name worldwide. It is borne by 7 people.

The last name O'Nil is most common in The United States, where it is held by 2 people, or 1 in 181,229,466. In The United States O'Nil is primarily concentrated in: Delaware, where 50 percent reside and Missouri, where 50 percent reside. Apart from The United States O'Nil occurs in 5 countries. It is also found in Brazil, where 17 percent reside and Canada, where 17 percent reside.

O'Nil Family Population Trend ^{historical fluctuation}

The occurrence of O'Nil has changed through the years. In The United States the number of people bearing the O'Nil surname fell 60 percent between 1880 and 2014.

O'Nil Last Name Statistics ^demography

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