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Find more Kozlwski 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 11 more people named Kozlwski 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 7 people named Kozlwski in the 1930 U.S. Census. In 1940, there were 157% more people named Kozlwski in the United States. What was life like for them?

Picture the past for your ancestors.

In 1940, 18 people named Kozlwski were living in the United States. In a snapshot:

  • For 8 females, Irene was the most common name
  • On average men worked 44 hours a week
  • 3 owned their homes, valued on average at $3,300
  • 18 rented out rooms to boarders

Learn where they came from and where they went.

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

  • 6 were born in foreign countries
  • Most immigrants originated from Poland
  • 1 were first-generation Americans
  • They most commonly lived in Connecticut