ENThe article investigates family and marital relations of Lithuanian princes in the 14–15th centuries, as well as overviews the famous branches of the dynasty. Typically, origins of medieval dynasties were controversial, since the historical sources did not allow to settle the reliable provenance of the dynasty. The same could be stated for their ethnic origin. Dynastical policy implemented by the Gedi - minids princes was typical for the sovereign dynasties at that time. However, it had its own special characteristics. At the beginning of the expansion to the SouthWestern lands of Rus’ dynastic marriages with representatives of the local Rurik dynasty were often used to make the expansion eligible. In the sovereign state, marital plans of the Lithuanian rulers were a tool of their foreign policy. Rulers paid a special attention to the North-Eastern region and their Western neighbors, which was important for the inner policy. Keywords: the house, Grand Duchy of Lithuania, Gediminids, appanage princes. [From the publication]