* Henrietta Swan Leavitt (1868-1921): An American astronomer who discovered the period-luminosity relationship for Cepheid variable stars, a fundamental tool for measuring distances in the universe. She is considered a pioneering figure in astronomy.
* Samuel Leavitt (1932-2019): American author and poet. He was known for his poetry collections, such as "The Long Home" and "The Journey."
* Jesse Leavitt (1819-1897): An American politician and lawyer who served as a U.S. Representative from Iowa.
* John Leavitt (1792-1873): An American politician and physician who served as a U.S. Representative from Massachusetts.
It's important to note that the name Leavitt is not as common as some other surnames, so finding many well-known figures might be challenging.