Jan Soběslav of Moravia (c. 1357 – c. 30 October 1380) was a feudal lord in Moravia. He was a Junior Margrave of Moravia.
In historiography, he was often mistaken for his illegitimate half-brother Jan of Moravia, who went into an ecclesiastical career and rose to the Patriarchate of Aquileia.
Biography
Jan was the second son of John Henry, Margrave of Moravia and Margaret of Opava, born between 1355 and 1357. He was raised in Prague in the court of his uncle, Charles IV, Holy Roman Emperor. He was briefly engaged to Charles' daughter Elisabeth of Bohemia, but the marriage never materialized.
Upon the death of his father, Jan Soběslav and his elder brother Jobst of Moravia quarreled over their inheritance. Jan attacked and illegally occupied estates belonging to Jobst. Their issues were settled in 1377 after mediation by Charles IV.
He and his brothers Jobst and Prokop jointly ruled as Margraves of Moravia. John Soběslav likely died around 30 October 1382. His inheritance was the impetus behind a dispute between Jobst and Prokop, which grew into the Moravian Margrave Wars.