father predecessor successor succession mother spouse issue image article_title name reign
nicolae alexandru vladislav i dan i voivode of wallachia lady maria ana calinica dan i , mircea i , staico radu i.jpg radu i of wallachia
 radu i c. 1377 -- c. 1383
radu i of wallachia

radu i was a ruler of the principality of wallachia , -lrb- c. 1377 -- c. 1383 -rrb- .
his year of birth is unattested in any primary source .
he was the son of nicolae alexandru and half-brother and successor to vladislav i .
he is identified by many historians as the legendary radu negru , a mythical voievode of the early medieval state wallachia , founder of the state 's institutions and ruler .
