O'hallavan Family History

You can see how O'hallavan families moved over time by selecting different census years. The O'hallavan family name was found in the USA in 1880. In 1880 there were 5 O'hallavan families living in New York. This was 100% of all the recorded O'hallavan's in USA. New York had the highest population of O'hallavan families in 1880.

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