Petar II Petrović-Njegoš
Petar II Petrović-Njegoš was born Radivoje "Rade" Petrović on in the mountain village of Njeguši, near Cetinje. His father, Tomislav "Tomo" Petrović (b. 1762–63), was a member of the Petrović clan of the Njeguši tribe of Katuni "nahiya". Njegoš's mother, Ivana Proroković, hailed from the hamlet of Mali Zalaz and was the daughter of Njeguši captain Lazo Proroković. There is no reliable information about her exact year of birth, but it is believed that she was about ten years younger than her husband. Tomo and Ivana had five children; their eldest son was Petar ("Pero"), Rade was their middle son and Jovan ("Joko") was their youngest. The couple's daughters were named Marija and Stana; Marija was married to a Montenegrin chieftain named Andrija Perović, the "serdar" (count) of Cuce, while Stana was married to Filip Đurašković, the "serdar" of Rijeka Crnojevića.
Mihailo Petrović
He published a large number of inventions, scientific works, books and journals from his sea expeditions. He received numerous awards and acknowledgments and was a member of several foreign science academies (Prague, Bucharest, Warsaw, Kraków) and scientific societies. In 1927, when Jovan Cvijić died, members of the Serbian academy proposed Mihailo Petrović as the new president of academy, but the authorities did not accept this proposal. Probable reason for this was the fact that Mihailo Petrović Alas was first a private tutor and mentor and later a close friend of the prince Đorđe P. Karađorđević, the king's brother, who was arrested in 1925, and held in house arrest. In fact, the "close friendship" has been alleged to have included erotic involvement, so the father, King Peter I of Serbia accused Petrović in a private conversation of "stamping from behind" (in Serbian "печати одостраг", to wit: having anal intercourse with) Đorđe when the latter was a Crown Prince. The King was also upset when he read in a Belgrade journal that Petrović had written to prince Đorđe a personal letter signed with "Your dog on a chain", stating that "a man of integrity is not supposed to send such letters to a mere boy".