John III of Pernstein, Bohemian land-owner, Governor of Moravia and Count of Kladsko (d. 1548)
Jan IV of Pernštejn (also known as Jan of Pernstein, John of Pernstein, Jan the Rich or John the Rich in English, Jan z Pernštejna a na Helfštejně or Jan Bohatý in Czech, and Johann von Pernstein or Hans von Pernstein auf Helfenstein in German; 14 November 1487 in Moravský Krumlov – 8 September 1548 in Hrušovany u Brna) was a Moravian-Bohemian nobleman. He was High Treasurer of Moravia in 1506–1516 and Landeshauptmann of Moravia in 1515–1519 and in 1526–1528 and Governor of Moravia in 1530–1532. In 1537–1548, he was Count of Kladsko and pledge lord of the County of Kladsko.