Ontonowicz Family History

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

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