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

The last name O'Callagham occurs in England more than any other country/territory. It can be rendered in the variant forms:. Click here for other possible spellings of this name.

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

It is the 7,117,718^th most widely held family name throughout the world. It is borne by approximately 1 in 1,041,077,988 people. The last name is primarily found in Europe, where 57 percent of O'Callagham reside; 57 percent reside in Northern Europe and 57 percent reside in British Isles.

This surname is most frequently used in England, where it is held by 3 people, or 1 in 18,572,686. In England it is primarily found in: Greater London, where 67 percent are found and Isle of Wight, where 33 percent are found. Apart from England O'Callagham is found in 3 countries. It is also found in The United States, where 43 percent are found and Ireland, where 14 percent are found.

O'Callagham Family Population Trend ^{historical fluctuation}

The prevalency of O'Callagham has changed over time. In England the number of people bearing the O'Callagham surname decreased 67 percent between 1881 and 2014 and in The United States it grew 300 percent between 1880 and 2014.