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You've got family at Ancestry.

Find more Thelan 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 171 more people named Thelan 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 179 people named Thelan in the 1930 U.S. Census. In 1940, there were 96% more people named Thelan in the United States. What was life like for them?

Picture the past for your ancestors.

In 1940, 350 people named Thelan were living in the United States. In a snapshot:

  • Most common occupation was salesman
  • 2 reported their race as other than white
  • 27% were children
  • 334 rented out rooms to boarders

Learn where they came from and where they went.

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

  • They most commonly lived in New York
  • 75 were first-generation Americans
  • Most mothers originated from Michigan
  • 60 migrated within the United States from 1935 to 1940