The Duchy of Pomerania-Schlawe,[a] also known as the Duchy of Sławno,[b] was a feudalduchy with its capital in Sławno, located in Pomerania (in modern northwest Poland). It was formed in 1190, when it separated from the Duchy of Szczecin. In 1238 it was conquered and incorporated into the Duchy of Gdańsk.
^Erich Hoffmann, Die Bedeutung der Schlacht von Bornhöved für die deutsche und skandinavische Geschichte, in: Zeitschrift des Vereins für Lübeckische Geschichte und Altertumskunde, vol. 57. 1977. p. 9-37, here p. 15.
^Martin Wehrmann. Genealogy of the Pomeranian ducal house. Verlag Leon Sauniers Buchhandlung, Stettin. 1937, p. 45–46.
^Rymar E., Rodowód książąt pomorskich. Szczecin. Książnica Pomorska. 2005. ISBN 83-87879-50-9, OCLC 69296056.
^E. Rymar, Rodowód książąt pomorskich, pp. 255-258.
^E. Rymar, Rodowód książąt pomorskich, pp. 123-125, 203-209.