Jošt I of Rosenberg

Jošt I of Rosenberg (Latin Jodocus, died 24 June 1369) was the third son of Peter I of Rosenberg and Kateřina of Vartenberk, and husband of Anežka of Wallsee. After his father died in 1347 he succeeded him as Supreme Chamberlain of Bohemia, holding the office until 1351.

With his mother and brothers he founded a Minorite monastery in Český Krumlov. In the 1360s he and his brothers had long, bitter power struggles with Emperor Charles IV.