Oneillo Family History

You can see how Oneillo families moved over time by selecting different census years. The Oneillo family name was found in the USA in 1880. In 1880 there was 1 Oneillo family living in New York. This was 100% of all the recorded Oneillo's in USA. New York had the highest population of Oneillo families in 1880.

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