Eastern Catholic clergy in Ukraine

The Eastern Catholic clergy of the Ukrainian Greek Catholic Church formed a tight-knit hereditary social caste that dominated Ukrainian society in Western Ukraine, from the late eighteenth until the mid-twentieth centuries, following reforms instituted by Emperor Joseph II, Sovereign of the Kingdom of Galicia and Lodomeria. Because, like their Eastern Orthodox brethren, married men in the Ukrainian Catholic Church could become priests (although they could not become Bishops unless they were widowers), they were able to establish "priestly dynasties", often associated with specific regions, for many generations.

Source: Wikipedia — Eastern Catholic clergy in Ukraine (CC BY-SA 4.0)