Find more Kostszewski 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 1 less person named Kostszewski in the United States — and some of them are likely related to you.
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 Kostszewski in the 1930 U.S. Census. In 1940, there were 14% less people named Kostszewski in the United States. What was life like for them?
In 1940, 6 people named Kostszewski were living in the United States. In a snapshot:
As Kostszewski families continued to grow, they left more tracks on the map: