View the most religious surnames in Ireland

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

The surname O'Hallahan is held by more people in New Zealand than any other country or territory. It can be rendered as:. Click here for other potential spellings of this last name.

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

This surname is the 4,532,898^th most frequently used surname on a worldwide basis It is held by approximately 1 in 383,555,048 people. This surname is primarily found in Oceania, where 84 percent of O'Hallahan are found; 84 percent are found in Australasia and 84 percent are found in Australia and New Zealand.

This last name is most numerous in New Zealand, where it is carried by 12 people, or 1 in 377,360. In New Zealand it is most prevalent in: Waikato Region, where 83 percent reside and Wellington Region, where 8 percent reside. Aside from New Zealand it exists in 3 countries. It is also found in Australia, where 21 percent reside and The United States, where 16 percent reside.

O'Hallahan Last Name Statistics ^demography

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