LTReikšminiai žodžiai: Eduardas Gizevijus; Etninė kultūra; Etnologija; Gustavas Gizevijus; Klaipėdos kraštas [Klaipeda region]; Lietuvių etnologija; Lietuvninkai; Muzikologija; Prūsija; Rytų Prūsija [East Prussia]; East Prussia; Eduard Gisevius; Ethnic culture; Ethnology; Gustav Gisevius, Lithuanian ethnology; Gustaw Gisevius; Lietuvninkai; Memelgebiet; Musicology; Prussia.
ENEduard Gisevius (1798-1880) is a well-known personality for Prussian Lithuania (Lithuania-Minor) ethnic culture heritage researchers. He provided outstanding works recording, describing, publishing and researching the way of living and spiritual and material culture of local Lietuvininkai people in East Prussia of the 19th century. In the same way the memory of another person, Gustaw Gisevius (1810-1848) is kept alive in a nearby situated other East Prussian land - Masuria. He is honoured for his struggle against the Germanization policy there, as well as for collecting, editing and propagating the local Polish Masurians' folklore. And a paradox arises here: Gustaw Gisevius is well-known in Poland at present times, but not in Lithuania, and Eduard Gisevius is well-known in Lithuania, but not in contemporary Poland. We have to correct this historical mistake. Other topical questions also have to be highlighted: Were those two outstanding men (both of them citizens of the Prussian Kingdom) relatives? Were they familiar with each other? Did they meet and did they communicate with each other? What sort of personal relationships might be considered here?.The main idea of this article is to shed light on all the possible aspects in this case. According to Emilia Iwin-Kot, a historian from Ostróda museum in Poland, it is possible to acquire information about at least 54 Gisevius family representatives from eight generations since 1580, and there is enough clear information in the museum documents to establish a brother-in-law relationship between Eduard and Gustaw Gisevius. A presumption is raised here about possible contacts between those two outstanding persons in Königsberg and their communication on the topic of common problems connected with the Germanization policy and the ways to struggle with it for both Masurian and Lietuvininkai people, as well as about native language and cultural heritage preservation for both national minorities in East Prussian lands at that time. [From the publication]