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Find more Mraz 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 120 more people named Mraz 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 905 people named Mraz in the 1930 U.S. Census. In 1940, there were 13% more people named Mraz in the United States. What was life like for them?

Picture the past for your ancestors.

In 1940, 1,025 people named Mraz were living in the United States. In a snapshot:

  • Most common occupation was farmer
  • 1,003 rented out rooms to boarders
  • 50%, or 131 people, lived in homes they rented
  • 286 were children

Learn where they came from and where they went.

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

  • They most commonly lived in Pennsylvania
  • 93 migrated within the United States from 1935 to 1940
  • 234 were born in foreign countries
  • Most mothers originated from Czechoslovakia