View the most religious surnames in Ireland

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

The surname Riordain occurs more in England more than any other country/territory. It may also appear as: Ríordáin. Click here for further potential spellings of this surname.

How Common Is The Last Name Riordain? ^{popularity and diffusion}

The surname is the 5,587,209^th most commonly held family name on a worldwide basis. It is borne by around 1 in 607,295,493 people. This surname is primarily found in Europe, where 67 percent of Riordain are found; 58 percent are found in Northern Europe and 58 percent are found in British Isles.

The last name Riordain is most widespread in England, where it is held by 5 people, or 1 in 11,143,612. In England it is most prevalent in: Oxfordshire, where 80 percent live and Greater London, where 20 percent live. Excluding England this surname exists in 3 countries. It is also found in The United States, where 33 percent live and Ireland, where 17 percent live.

Riordain Family Population Trend ^{historical fluctuation}

The incidence of Riordain has changed through the years. In England the share of the population with the last name grew 500 percent between 1881 and 2014; in The United States it grew 133 percent between 1880 and 2014 and in Ireland it grew 200 percent between 1901 and 2014.

Riordain Last Name Statistics ^demography

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