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Find more Dethlefs 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 44 more people named Dethlefs in the United States — and some of them are likely related to you.

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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 153 people named Dethlefs in the 1930 U.S. Census. In 1940, there were 29% more people named Dethlefs in the United States. What was life like for them?

Picture the past for your ancestors.

In 1940, 197 people named Dethlefs were living in the United States. In a snapshot:

  • The average annual income was $1,188
  • 45%, or 27 people, lived in homes they rented
  • 5 were disabled
  • The typical household was 2 people

Learn where they came from and where they went.

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

  • 22% were born in foreign countries
  • 34 were born in foreign countries
  • The most common mother tongue was German
  • Most mothers originated from Germany