The Gajewski family - a Polish noble family with the coat of arms of Ostoja, belonging to the heraldic Clan Ostoja (Moscics), derived from the Błociszewski family, Ostoja coat of arms from Błociszewo in the former of Kościan district of Poznań voivodeship. The Gajewski family took their surname from the village of Gaj, located, like Błociszewo, in the former of Kościan district of the Poznań voivodeship, which they had owned since 1475.