One of the sons of king Daniel I of Galicia of the house of Romanovich, Shvarn inherited the north-western parts of the Kingdom of Galicia–Volhynia, his fathers' domain. This land included the town of Halicz itself, as well as the land across the Bug River, that is Red Ruthenia with the towns of Bełz, Czerwień, Mielnik, Drohiczyn and eventually also Kholm (since 1264). His brother Lev I inherited the southern part of the land, with the cities of Lviv and Przemyśl, while Roman became the heir of duchies of Lutsk and Terebovl.