This paper presents the histories of noblemen families, living on the Wielkopolska-Brandenburg borderland. The histories of Bronikowscy, Bukowieccy, Dziembowscy, Kalcreuth, Prettwitz, Schlichting, Unrug and Troschke have an aura of mystery; for instance the history of the Prettwitzs' coat of arms: a Slavic warrior called Hołub reportedly played a game of chess with a black duchess, in connection with which the family's crest shows a black woman, her face dripping blood. ; The above-named families made a point of producing their own post-mortern portraits on their coffins. This custom was typical mainly of XVI-XVIII-century Wielkopolska, but not only. One should note, however, that the coffin portraits tradition existed exclusively in Poland and so it was unprecedented in the whole of European portrait painting. The coffin portraits in question can now be seen in Międzyrzecz's Museum. It is Poland's biggest collection of this kind of incalculable value. ; The families were of varying origin: Polish, German and Czech. Their presence on the Wielkopolska-Brandenburg borderland was really fruitful - their heritage comprises a number of monuments: noblemen's mansions and palaces and a host of movables. Often they shaped the history of the Poland and their descendants nurtured patriotic traditions, e.g. rear admirał Józef Unrug, who commanded the navy defending the Polish coast in 1939. ; The coffin portraits and genealogical data found in escutcheons and inscriptions were used to reconstruct the history which deserves not only historians' interest.