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/wiki/Nicholas_von_Renys
Nicholas von Renys (German: Nikolaus von Renys; Polish: Mikołaj z Ryńska; 1360 - 1411) was a secular Prussian knight during the Polish-Lithuanian-Teutonic War (1409-1411).
Nicholas von Renys was born at Rhein (Ryn) near Lötzen (Giżycko) in Prussia, within the komturship of Balga. Jan Długosz described him as a German (Nicolaus dictus Niksz, nacione Swewus) in his Banderia Prutenorum.[1] Stephen Turnbull identifies him as a "secular knight of Polish descent ... of the clan Rogala"
Nicholas von Renys was born at Rhein (Ryn) near Lötzen (Giżycko) in Prussia, within the komturship of Balga. Jan Długosz described him as a German (Nicolaus dictus Niksz, nacione Swewus) in his Banderia Prutenorum.[1] Stephen Turnbull identifies him as a "secular knight of Polish descent ... of the clan Rogala"
During the Battle of Grunwald in 1410, von Renys carried the banner of the Culmerland troops for the Teutonic Order, described in the Latin Banderia Prutenorum.[1] Unwilling to fight against Poland, he lowered the banner, which was considered a signal for retreat that contributed to the defeat of the Knights.