Pietrzak is a Polish patronymic surname, like Pietrzyk and Pietrzykowski, developed from the given name Piotr, when it was still Pietr, before it stabilized in its present form, Piotr, following the so-called .
Pietrzak is a Polish patronymic surname, like Pietrzyk and Pietrzykowski, developed from the given name Piotr, when it was still Pietr, before it stabilized in its present form, Piotr, following the so-called .
The oldest surviving record of the surname Pietrzak in Poland dates back to 1639, and, for example, in a very old parish book in Tropie, Lesser Poland Voivodeship, from 1668, when the surname of a Tropie resident was recorded as Bartłomiej Pietrzak. The largest number of Pietrzaks, nearly one third of all, live in central Poland, i.e. the Łódź and Masovian Voivodeships.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).