In 1473, Rafał Leszczyński obtained from Emperor Frederick III the title of count.

The family name derives from Leszczyna, now a suburb of Leszno, Greater Poland.

The Leszczyński family obtained the title of count of Leszno in the Holy Roman Empire.

The family had its greatest importance in the late 16th and early 17th centuries, when they were ardent supporters of Calvinism and turned their estates of Leszno and Baranów Sandomierski into major centres of the Polish Reformed Church.

There is another unrelated Leszczyński family with the Abdank coat of arms.