Johannes von Leysen (also Leyssen, Laissen, LayÃÂ, ; 1310 – 1388) was the first mayor of Allenstein (Polish: Olsztyn), Warmia in Prussia (now in Poland) in 1353.
Leysen came from a well-known family, recognized in colonizing southern Warmia within the State of the Teutonic Order. His grandfather Martin came to Prussia in 1304 as a free peasant, and was a founder and then Schultheiàof Layà(à Âajsy) near Mehlsack (PieniÃÂà ¼no). His father Gerico inherited the position of Schultheiàfrom his father. Johannes's brother Heinrich von Leysen was the founder of Wartenberg (Wartembork, since 1946 Barczewo) and a village, Skaibotten (Skajboty).
On 13 October 1353, Leysen received a settlement privilege from the Bishopric of Warmia. In 1372 he was promoted to the German nobility, adding the preposition von.