The Treaty of Königsberg was signed in Königsberg (Królewiec) on May 26, 1390 during the Lithuanian Civil War (1389–1392) between Samogitian nobles and representatives of the Teutonic Knights. The 31-member or 30-memberZenonas Ivinskis and Jonas Puzinas interpreted that note "Eywild Eynuren bruder" refers to two persons: Eywild and some unnamed brother of Eynur. Rimvydas Petrauskas interpreted that it was one person. delegation from seven Samogitian regions (Ariogala, Kaltinėnai, Knituva, Kražiai, Medingėnai, Raseiniai, and Viduklė) arrived to Königsberg around the pentecost. They promised their loyalty to "their king" Vytautas and guaranteed trade freedom for the Knights in Samogitia. The Knights gifted the nobles with food and clothes.
Vytautas the Great waged a civil against his cousin Jogaila, Grand Duke of Lithuania and King of Poland. In order to secure Teutonic support in the civil war, Vytautas signed the Treaty of Lyck and granted Samogitia up to the Nevėžis River to the Knights on January 19, 1390. Samogitia was important for the Knights as this territory physically separated them from uniting with the Livonian Order in the north. Support of Samogitians was crucial to Vytautas as it was the only guarantee that the Treaty of Lyck would be carried out. However, Vytautas betrayed the Knights when in 1392 he reconciled with his cousin Jogaila and signed the Ostrów Agreement. Samogitia was not ceded to the Knights until the Treaty of Salynas in 1398. The treaty and the 30 names of Samogitian nobles are important for the study of personal names in pagan Lithuania.
List of Samogitian nobles # Reconstructed name Recorded name Where from Notes 1 Asteika Hosteike Raseiniai 2 Bimantas, Bymantas Bimunt Viduklė 3 Daukša Dawchs Kaltinėnai 4 Dirkštelis Dirkstel Medininkai 5 Dramutis Dramutte Ariogala In 1401, with his son witnessed the Union of Vilnius and Radom 6 Eikutis Eycutte Kražiai In 1419, he was a court official in Medininkai 7 Eimantas Eymund Kaltinėnai 8 Einorius, Einoras Eynur Kražiai 9 Eivildas, Eiviltas Eywild Eynuren bruder Kražiai In 1413, received Ciołek coat of arms according to the Union of Horodło 10 Erimas Erim Ariogala 11 Gelvonas Gelwan Viduklė 12 Getas, Gedas Getez Kražiai 13 Gineitis Gineth Ariogala In 1413, received Zaremba coat of arms according to the Union of Horodło; in 1433, served as elder of Kaunas 14 Jodeika, Joteikis Jotheke Ariogala 15 Klausigaila Clawssegail Raseiniai Active during the Samogitian uprising of 1409; testified to Benedict Makrai regarding the Samogitian border in 1413 16 Mazbutas Maisebuth Medininkai 17 Pamplys Pampli Knituva 18 Ragelis Ragel Kaltinėnai 19 Ramontas, Ramavydas Ramomt, Ramouit Kražiai 20 Rėkutis Roeukutte Medininkai 21 Skutas Skutez Kaltinėnai 22 Skvaibutis Sqwaybuth Kaltinėnai 23 Sungaila, Surgaila Sungail Viduklė Might be identical to Sungalo who testified in the Council of Constance in 1416 and was later killed by the Knights 24 Surtenis, Surtinis Surthen Viduklė 25 Tyla, Tylenis Tilen Kaltinėnai 26 Vidas, Vydas Wide Kražiai 27 Vilaudis, Vyliaudas Wilawde Ariogala 28 Zundys Sunde Ariogala 29 Žaudys Zawden Raseiniai 30 Žilpa Zilpe Knituva
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