This project is open for male descadents of the noble Clan of Ostoja. The purpose of the project is to estabish genetical relation
between Clan families and to research Clan origin and development.

Clan Ostoja (ancient Polish: Ostoya) was a powerful group of knights and lords in late-medieval Europe. The Clan encompass families in the Polish-Lithuanian Commonwealth, Upper Hungary (Slovakia), Hungary, Transylvania, Belarus, Ukraine, and Prussia. The Clan crest is the Ostoja coat of arms and the battle cry is Ostoja ("Mainstay") or Hostoja. During the Polish-Lithuanian Commonwealth, the Clan adopted several Lithuanian and Belarusian families, generally of Ruthenian princely origin, and transformed into a Clan of landlords, senators and nobility.