Janusz Radziwiłł was a Polish–Lithuanian magnate. He was the Lithuanian deputy cup-bearer since 1599, the castellan of Vilnius since 1619, and the starost of Borysów. Radziwiłł also held the title of Reichsfürst of the Holy Roman Empire.
- Occupation
- military personnel
- Position held
- Great Royal Deputy Cup-bearer of Lithuania, Castellan of Vilnius, Q66201163, Deputy to the Sejm of the Polish–Lithuanian Commonwealth
- Citizenship
- Polish–Lithuanian Commonwealth
- Born
- July 2, 1579, July 21, 1579
- Died
