Voievod in the context of "Danubian Principalities"

Michael I (Romanian: Mihai I [miˈhaj]; 25 October 1921 – 5 December 2017) was the last king of Romania, reigning from 20 July 1927 to 8 June 1930 and again from 6 September 1940 until his forced abdication on 30 December 1947.

Shortly after Michael's birth, his father, Crown Prince Carol, had become involved in a controversial relationship with Magda Lupescu. In 1925, Carol was pressured to renounce his rights (in favour of his son Michael) to the throne and moved to Paris in exile with Lupescu. In July 1927, following the death of his grandfather Ferdinand I, Michael ascended the throne at age five, the youngest crowned head in Europe. As Michael was still a minor, a regency council was instituted, composed of his uncle Prince Nicolas, Patriarch Miron Cristea and Chief Justice Gheorghe Buzdugan. The council proved to be ineffective and, in 1930, Carol returned to Romania and replaced his son as monarch, reigning as Carol II. As a result, Michael returned to being heir apparent to the throne and was given the additional title of Grand Voievod of Alba-Iulia.

Radu I (died 1383 or 1385) was a Voivode of Wallachia (c. 1377 – c. 1383/1385). His year of birth is unattested in primary sources. He was the son of Nicolae Alexandru and half-brother and successor to Vladislav I. He is identified by historians as the name origin of the legendary Radu Negru, a mythical voievode of the early medieval state Wallachia, founder of the state's institutions and ruler.