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Find more Groos 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 433 more people named Groos 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 201 people named Groos in the 1930 U.S. Census. In 1940, there were 215% more people named Groos in the United States. What was life like for them?

Picture the past for your ancestors.

In 1940, 634 people named Groos were living in the United States. In a snapshot:

  • 129 adults were unmarried
  • The youngest was 1 and the oldest was 97
  • Although 53% were female, the most common name for males was John
  • 20% of women had paying jobs

Learn where they came from and where they went.

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

  • Most mothers originated from Illinois
  • 69 were first-generation Americans
  • 34% were first-generation Americans
  • 93 migrated within the United States from 1935 to 1940