The House of Zierotin or House of Žerotín was a Czech noble family in the Lands of the Bohemian Crown, one of the oldest and most illustrious noble families from Bohemia and Moravia. The family was first mentioned around the year 1200 as Bludovici (Blud of Bludov), later renamed Žerotínové, and achieved the rank of Imperial Counts in the Holy Roman Empire. The male line of this family died out in 1985. Its estates, manor Bludov, were returned to their female descendants, the family Mornstein-Zierotin after fall of Communist rule in 1989.
