Jakub Ostroróg (c. 1516-1568) was a prominent 16th-century Polish magnate and politician from Poznań.
He was one of the main leaders of the community of Bohemian Brethren, who were followers of Jan Hus, in the area.
[2] Under his patronage the Protestant community in Poznań expanded, although it subsequently declined over the course of the 17th century, after his death.
[4] He owned property in Ostroróg, a village located about 47 kilometers northwest of Poznań, which was used as a residence of the seniors of the Bohemian Brethren movement.
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