O'sullavan Family History

You can see how O'sullavan families moved over time by selecting different census years. The O'sullavan family name was found in the USA in 1880. In 1880 there were 4 O'sullavan families living in Illinois. This was 100% of all the recorded O'sullavan's in USA. Illinois had the highest population of O'sullavan families in 1880.

Use census records and voter lists to see where families with the O'sullavan surname lived. Within census records, you can often find information like name of household members, ages, birthplaces, residences, and occupations.