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.
Pedro Carlos of Orléans-Braganza
Prince Pedro Carlos was born in Petrópolis, the eldest son of six children of Prince Pedro Gastão of Orléans-Braganza and his wife, Princess Maria de la Esperanza of Bourbon-Two Sicilies. He was baptised with the names "Pedro de Alcântara Carlos João Lourenço Miguel Rafael Gabriel Gonzaga".
Paternally, Pedro Carlos is a cousin of Prince Henri, Count of Paris, Duke of France (born 1933), Orléanist pretender to the French throne, and great grandnephew of Duarte Pio, Duke of Braganza (born 1945), pretender to the throne of Portugal and uncle of Prince Peter of Serbia, eldest son of Crown Prince Alexander. On the maternal side, he is also a cousin of Juan Carlos I of Spain  (born 1938).