They held the castles Rožmitál, Blatná and Buzice.
This family came of an ancient and noble Buzici clan – boyars, members of higher Slavic nobility.
Omeljan Pritsak concluded in research about the Attila clan of the Hunnic Empire that the religious suffix 'sig' when combined with Hunnic 'Buz' would mean "Wild Boar like-man", a symbol in the family emblem.
In addition she thinks that the movement of the Slavs in Europe is accompanied under the leadership of the ruling class of Huns, whose language gradually melted into Slavonic.
Gradually the family lost their power, moved to Moravia and finally became part of the stock that emigrated to Poland after the Battle of White Mountain and the events in 1626.