View the most religious surnames in Ireland

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

O'Cleary is borne by more people in England than any other country/territory. It can appear as a variant:. For other potential spellings of O'Cleary click here.

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

The surname is the 2,460,878^th most frequently occurring family name internationally, borne by approximately 1 in 119,467,966 people. The surname O'Cleary is mostly found in Europe, where 95 percent of O'Cleary live; 93 percent live in Northern Europe and 93 percent live in British Isles.

This surname is most frequently occurring in England, where it is borne by 34 people, or 1 in 1,638,766. In England O'Cleary is mostly found in: West Midlands, where 59 percent are found, Oxfordshire, where 18 percent are found and Greater London, where 18 percent are found. Beside England this surname occurs in 5 countries. It is also found in Northern Ireland, where 26 percent are found and Ireland, where 11 percent are found.

O'Cleary Family Population Trend ^{historical fluctuation}

The prevalency of O'Cleary has changed over time. In Ireland the number of people bearing the O'Cleary last name declined 56 percent between 1901 and 2014 and in The United States it declined 67 percent between 1880 and 2014.

O'Cleary Last Name Statistics ^demography

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