Yoncius Family History

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

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