Jonas Vaidutis (Latin: Waydutte; Polish: Jan Wajduta Butawtowicz; 1365 – spring 1402) was a Lithuanian duke, priest, and academic rector from the Gediminid dynasty.
[1] Therefore, in 1365, Butautas retreated first to the Prussia region controlled by the State of the Teutonic Order and then to the royal manor of Charles IV, Holy Roman Emperor in Prague, the capital city of the Kingdom of Bohemia.
[1][6][7][13] The Toruń chronicle attests that Vaidutis arrived in Riesenburg in early February, with Kęstutis supposedly being unaware of his departure.
[17][18] He subsequently traveled to the imperial court in Prague,[6] arriving after his father Butautas had died there,[13] possibly of a plague outbreak in the city.
[8] Later on, Jonas Vaidutis moved to the Kingdom of Poland, which was ruled by his Gediminid relative, King Władysław II Jagiełło (Lithuanian: Jogaila).
[21] His candidacy was supported by the outgoing rector, Stanisław of Skarbimierz, who delivered a laudation in favor of the prince, emphasizing his theological education, noble birth, and virtuous conduct.