First found in Polesie, the largest province of Poland. It is inhabited by Ruthenians, called Polesians, of Ukrainian descent. This name was a popular name with Polish royalty in the times before surname usage had begun in Poland, beginning with Duke Casimir the Restorer in 1015-1058. Kobryn was the seat of the Kazimierowski family. The surname became noted for its many branches in the region, each house acquiring a status and influence which was envied by the princes of the region. In their later history the name became a power unto themselves and were elevated to the ranks of nobility as they grew into this most influential family.

Some of the first settlers of this family name or some of its variants were: Moses Kasminsky, who arrived in New York, NY, in 1862; Anton Kazimierowski and Catherine Kazimierowski, who arrived in New York, NY in 1867 en route to Texas.

For more information on the last name Kaczmarczyk, the PDF Surname History is available for purchase as well as other products.