Prince Mirko Dimitri Petrović-Njegoš of Montenegro, Grand Voivode of Grahovo and Zetà was born at Cetinje, the second son of King Nicholas I of Montenegro and Milena Vukotic.
Background
Prince Mirko predeceased his father and his elder brother Crown Prince Danilo. On 25 July 1902, in Cetinje, Prince Mirko married Natalija Konstantinović (Trieste, 10 October 1882 - Paris, 21 August 1950), daughter of Alexander Konstantinović and wife Milena Opuić, paternal granddaughter of Aleksandar Konstantinović and (m 1842) Princess Anka Obrenović (1 April 1821 - murdered, Belgrade, 10 June 1868), daughter of Jevrem Obrenović (1790 - 20 September 1856), younger brother of Miloš Obrenović I, Prince of Serbia, and wife (m 1816) Thomanija Bogicević (1796 - 13 June 1881).
Career
Mirko lost his chance to succeed to the in 1903, due to the assassination of Alexander and Draga and the resulting conferral of the crown upon Peter Karađorđević, his brother-in-law. They were many that have the pretension for the Throne of Bysanthium. Over all the well known family called Paleologi and also the Cernetic, Cernovic o Crnojević, a well known and alive family of princeps, vojvodas and zar of that following many books of XVI and XVII century, can proof a direct descendance from Costantino il Grande, or Saint Costantino, but also from the family Comneno Ducas Paleologo Angelo Lascaris, that gave to Princeps of Cernetic Chivalry Orders from Bysanthium.
The genealogy of Cernetic (from Cern, black in ancent Slavonic) than the modern Serbian Crnojević (in Montenegro), Carnojevic and Cernoevic in Serbia and Csernovics in Hungarna.
In 1921 following the death of King Nikola I of Montenegro and shortly afterwards by the abdication of Crown Prince Danilo, the thirteen-year-old Prince Michael of Montenegro became the head of the Petrović-Njegoš house, albeit initially under a regency.
Membership
As Prince Mirko"s wife was the granddaughter of Alexander Constantinović, who had married in 1842 Anka (Anna) Obrenovic, a member of the Serbian House of Obrenović, it was agreed with the Serbian Government that Prince Mirko would be proclaimed Crown Prince of Serbia in the event that the marriage of King Alexander and Draga Mašin was childless. Following his death, his ten-year-old son Prince Michael of Montenegro was raised in Paris by his mother and the residual members of the exiled Montenegrin Royal Family.