

Polnischer Adliger, Militärführer, Marschall am Gerichtshof, Sejim-Marschall
Polish–Lithuanian Commonwealth
Berezhany
Mikołaj Hieronim Sieniawski (* 1. January 1645; † 15. December 1683 in Vienna) was a polnischer Adliger, Militärführer, Marschall am Gerichtshof, Sejim-Marschall. He was 38 years old. He was married to Cecylia Maria Radziwiłł. He had at least 2 children (1 son and 1 daughter). His cause of death was disease. He was buried at Berezhany.