Radu II of Wallachia

Radu II Praznaglava, was a ruler of Wallachia in the 15th century, ruling for 4 terms, each time preceded by Dan II, his rival for the throne, and each time succeeded by him. Of those 4 periods on the throne of Wallachia, all were within a period of only 7 years, and 3 terms lasted less than a year. He ruled:August 1420 – 1422 summer of 1423 autumn of 1424 January – spring of 1427