He was married to Princess Catalina Crnojević of Zeta, and was succeeded by his first cousin Mihnea cel Rău, son to his uncle Vlad Țepeș.
He was married to Princess Catalina Crnojević of Zeta (sometimes spelled as Katarina or Jekaterina), daughter of Andrija Crnojević. Radu was succeeded by his first cousin Mihnea cel Rău, son to his uncle Vlad Țepeș.