Thellefson Family History

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

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