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Find more Underdonk 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 7 more people named Underdonk 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 45 people named Underdonk in the 1930 U.S. Census. In 1940, there were 16% more people named Underdonk in the United States. What was life like for them?

Picture the past for your ancestors.

In 1940, 52 people named Underdonk were living in the United States. In a snapshot:

  • The average annual income was $769
  • 9% were disabled
  • 47 rented out rooms to boarders
  • 19% were children

Learn where they came from and where they went.

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

  • They most commonly lived in Iowa