Yes,Jovan Nikolic,Baron von Rudna and Princess Jelisaveta(Savka) Obrenovic had issue...their children and grandchildren married into Austro-Hungarian nobility...Milosh's grandson Michail married Countess Marianne Kinsky von Wchinitz und Tettau,while Milosh's other descedants though his daughter Princess Jelisaveta are families von der Reuth,Counts Hardegg auf Glatz und im Machlande,Barons Duka de Kadar and among them is the present 9th. Fürst Alexander Sulkowsky von Bielitz!
Through his other daughter Petria Prince Milosh also had descedants...Princess Petria married Teodor Bajic of Varadia and some of Petria's graddaughters also married into Austro-Hungarian nobility...
Ljubica Bajic of Varadia married Baron Heinrich von Trautenberg,Bohemian nobleman of Franconian roots whose family can trase their ancestry up to 13th century...
Marija Bajic of Varadia married Baron Bela von Tallian who was a friend of Prime-minister of Hungary Baron Istvan Tisza and was also a member of his government in 1903 till 1905 and as such had a dispute with Generaloberst Karl Tersztyanszky von Nadas...
Prince Milosh had one legitimate daughter Princess Marija who lived from 1821-1823,but he had 9 illegitimate children and among them three Marija'a and one Maria Clara...