Thonan Family History

You can see how Thonan families moved over time by selecting different census years. The Thonan family name was found in the USA in 1920. In 1920 there was 1 Thonan family living in Illinois. This was about 33% of all the recorded Thonan's in USA. Illinois and 2 other states had the highest population of Thonan families in 1920.

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