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

O'Mongain is carried by more people in Ireland than any other country/territory. It can also appear in the variant forms:. Click here for other potential spellings of this name.

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

The last name O'Mongain is the 10,311,814^th most common surname on a worldwide basis It is held by around 1 in 2,147,483,647 people. This last name is mostly found in Europe, where 133 percent of O'Mongain are found; 100 percent are found in Northern Europe and 100 percent are found in British Isles.

The last name O'Mongain is most widespread in Ireland, where it is held by 2 people, or 1 in 2,354,470. In Ireland O'Mongain is mostly concentrated in: Connaught, where 50 percent are found and Leinster, where 50 percent are found. Other than Ireland this last name occurs in 2 countries. It is also found in England, where 33 percent are found and Spain, where 33 percent are found.