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

The surname O'Callagham is held by more people in England than any other country or territory. It can occur in the variant forms:. For other possible spellings of this last name click here.

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

The surname O'Callagham is the 7,117,718^th most commonly held last name world-wide It is held by around 1 in 1,041,077,988 people. The last name O'Callagham occurs mostly in Europe, where 57 percent of O'Callagham live; 57 percent live in Northern Europe and 57 percent live in British Isles.

The surname is most numerous in England, where it is borne by 3 people, or 1 in 18,572,686. In England it is most frequent in: Greater London, where 67 percent are found and Isle of Wight, where 33 percent are found. Without taking into account England this last name is found in 3 countries. It also occurs 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 through the years. In England the number of people bearing the O'Callagham surname declined 67 percent between 1881 and 2014 and in The United States it expanded 300 percent between 1880 and 2014.