Thornsen Family History

You can see how Thornsen families moved over time by selecting different census years. The Thornsen family name was found in the USA, and Scotland between 1861 and 1920. The most Thornsen families were found in USA in 1880. In 1880 there were 5 Thornsen families living in Illinois. This was about 83% of all the recorded Thornsen's in USA. Illinois had the highest population of Thornsen families in 1880.

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