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Find more Mcwilliams 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 162 less people named Mcwilliams 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 10,855 people named Mcwilliams in the 1930 U.S. Census. In 1940, there were 1% less person named Mcwilliams in the United States. What was life like for them?

Picture the past for your ancestors.

In 1940, 10,693 people named Mcwilliams were living in the United States. In a snapshot:

  • For 5,396 females, Helen was the most common name
  • 12% reported their race as other than white
  • Although 50% were female, the most common name for males was John
  • 54%, or 1,451 people, lived in homes they rented

Learn where they came from and where they went.

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

  • 13% were first-generation Americans
  • 1,433 were first-generation Americans
  • 517 were born in foreign countries
  • They most commonly lived in Pennsylvania