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Find more Olthoff 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 34 more people named Olthoff 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 281 people named Olthoff in the 1930 U.S. Census. In 1940, there were 12% more people named Olthoff in the United States. What was life like for them?

Picture the past for your ancestors.

In 1940, 315 people named Olthoff were living in the United States. In a snapshot:

  • The typical household was 3 people
  • On average men worked 46 hours a week
  • 311 rented out rooms to boarders
  • 57 adults were unmarried

Learn where they came from and where they went.

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

  • The most common mother tongue was Holland
  • 64 migrated within the United States from 1935 to 1940
  • Most mothers originated from Michigan
  • 41 were born in foreign countries