You've got family at Ancestry.

Find more Cay 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 513 more people named Cay in the United States — and some of them are likely related to you.

Start a tree and connect with your family.


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 559 people named Cay in the 1930 U.S. Census. In 1940, there were 92% more people named Cay in the United States. What was life like for them?

Picture the past for your ancestors.

In 1940, 1,072 people named Cay were living in the United States. In a snapshot:

  • For 495 females, Mary was the most common name
  • 19% reported their race as other than white
  • The typical household was 3 people
  • 20% of women had paying jobs

Learn where they came from and where they went.

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

  • 7% were first-generation Americans
  • 38 were first-generation Americans
  • Most fathers originated from Kentucky
  • 187 migrated within the United States from 1935 to 1940