Where in Ireland does the family OSULLVAN come from? Is OSULLVAN a common surname in Ireland?
The maps on this page are based on the 1901 and 1911 census of Ireland, the data for which is available here: Census of Ireland.
There were 1 with this surname in Ireland in 1901. The surname is ranked 39533rd in Ireland in the same year, MURPHY is ranked 1st since it is the most common Irish surname.
The surname OSULLVAN was not found in the 1911 census.
There were no farmers with the surname OSULLVAN in the 1901 census.
Map shows the percentage of people with the surname OSULLVAN who are Catholic in each locality.
There were no Presbyterians with the surname OSULLVAN in the 1901 census.
There were no Anglicans with the surname OSULLVAN in the 1901 census.
List of consecutive consonant patterns associated with this surname:
When producing these maps, I use the exact spelling in the 1901/1911 Irish Census, with the following exceptions: All surnames are converted to their uppercase equivalents. I replace all occurrences of MC and M' with MAC. And I remove all non-alphabetical characters, such as hyphens, spaces, apostrophes and accents. This results, for example, in the names Mac Vey and McVey appearing together on the same map as MACVEY. Likewise, O'Neill, Oneill, ONeill and Ó Néill appear together as ONEILL and D'Arcy and Darcy are combined as DARCY. No other type of grouping is done.
A huge amount of effort has gone into the production of these maps and I have been very careful to ensure that the census data has been processed as accurately as possible. However, I take no responsibility should I have failed in any way in this regard. Nor shall I be held responsible for any errors on the official census website. As stated, the census is available online enabling you to confirm the information presented here for yourself. Enjoy!