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

The surname O'Rooney is held by more people in Canada than any other country or territory. It may occur in the variant forms:. For other possible spellings of O'Rooney click here.

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

The last name O'Rooney is the 5,057,639^th most numerous last name on a worldwide basis, borne by approximately 1 in 485,836,394 people. O'Rooney occurs mostly in The Americas, where 67 percent of O'Rooney reside; 67 percent reside in North America and 67 percent reside in Anglo-North America.

The last name is most commonly held in Canada, where it is borne by 8 people, or 1 in 4,605,699. In Canada it is most frequent in: British Columbia, where 100 percent are found. Excluding Canada this last name exists in 2 countries. It is also common in England, where 33 percent are found and The United States, where 13 percent are found.