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Find more Thesen relatives and grow your tree by exploring billions of historical records. Taken every decade since 1790, the U.S. Federal Census can tell you a lot about your family. For example, from 1930 to 1940 there were 17 more people named Thesen in the United States — and some of them are likely related to you.

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Create, build, and explore your family tree.

What if you had a window into the history of your family? With historical records, you do. From home life to career, records help bring your relatives' experiences into focus. There were 75 people named Thesen in the 1930 U.S. Census. In 1940, there were 23% more people named Thesen in the United States. What was life like for them?

Picture the past for your ancestors.

In 1940, 92 people named Thesen were living in the United States. In a snapshot:

  • They typically took 5 weeks of vacation a year
  • 25% of adults were unmarried
  • The youngest was 1 and the oldest was 82
  • For 42 females, Clara was the most common name

Learn where they came from and where they went.

As Thesen families continued to grow, they left more tracks on the map:

  • 9 migrated within the United States from 1935 to 1940
  • The most common mother tongue was Finnish
  • 40% were first-generation Americans
  • 30 were first-generation Americans