Mierzewski family with Ostoja coat of arms
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The Mierzewski (Mirzewscy) family - a Polish noble family with the Ostoja coat of arms, belonging to the heraldic Clan Ostoja (Moscics).[1] They come from the Popowski coat of arms Ostoja z Popowo, located in the former district of Kościan of Poznań voivodeship.[2] The Mierzewski family took their surname from the village of Mirzewo (sometimes Mierzewo, now Mierzejewo), located in the former district of Kościan of Poznań voivodeship.[3]