O'tonnor Family History

You can see how O'tonnor families moved over time by selecting different census years. The O'tonnor family name was found in the USA in 1920. In 1920 there was 1 O'tonnor family living in New York. This was 100% of all the recorded O'tonnor's in USA. New York had the highest population of O'tonnor families in 1920.

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