Pritzker Genealogy and Pritzker Family History Information
https://www.geni.com/surnames/pritzker

About the Pritzker surname
All Pritzkers are thought to be descendants of people who lived in a small town in Ukraine today called Velyki Prytsky.

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Pritzker family
American business family
Britannica
https://www.britannica.com/topic/Pritzker-family

[snip]

Pritzker family, American family prominent in business and philanthropy during the later 20th century.

The family’s fortunes began with Abram Nicholas Pritzker (b. January 6, 1896, Chicago, Illinois, U.S.—d. February 8, 1986, Chicago), who was the son of a Ukrainian Jewish immigrant who had come to Chicago in 1881 from Kiev. Abram Nicholas graduated from Harvard University with a law degree in 1920 and then went to work in his father’s law firm (later known as Pritzker & Pritzker).

He and his brother, Jack Nicholas Pritzker (b. January 6, 1904, Chicago—d. October 30, 1979, Chicago), left the firm in 1936 to try their hand at commerce, investing in real estate and small companies, particularly around the Chicago area. The family fortune quickly grew, and they managed to protect their profits from heavy taxation by putting the money into a number of trusts. Abram Nicholas also became a philanthropist on a large scale, helping establish the Pritzker School of Medicine at the University of Chicago and giving several million dollars annually to other causes.