Mapping Homogamy of Noble Descendants in Poland. A Case Study of the Genealogy of Descendants of the Great Sejm

Since 2005, a unique project has been under way, which aims to collect all possible descendants of the parliamentary élite of the 18^th-century Polish–Lithuanian Commonwealth (Rzeczpospolita). The project resulted in creating an online database called The Genealogy of Descendants of the Great Sejm, which provides a unique source of information about the genealogical structure of people descending from the 18^th-century noble élite of the Polish–Lithuanian Commonwealth. Drawing on these data, this paper aims to open up new lines of inquiry on the dynamics of homogamy of the Polish nobility by analyzing longer trends of several (e.g. five, eight, or even more) generations of nobles (or nobles’ descendants) in Poland over the last two centuries.