Montenegro: Rulers: 1852-1910

Ruling House: Petrović Njegoš (Петровић Његош)
Po milosti Božjoj, Knjaz i Gospodar Crne Gore (По милости Божјој, Књаз и Господар Црне Горе) \| By the Grace of God, Prince and Lord of Montenegro [1]
9/21 Sep 1852 - 1/13 Aug 1860	Danilo I (Данило I) [2]
1/13 Aug 1860 - 15/28 Aug 1910	Nikola I (Никола I) [3]

This version of the style is attested in princely decrees of 1910. Earlier forms lacked the introductory part.
Original name: Danilo Stankov Petrović (Данило Станков Петровић). Serving as the lord of Montenegro (vladika|владика), Danilo was designated prince by a popular assembly held in Cetinje in March 1852 during his absence from the country. A declaration signed by the Montenegrin nobility, clergy and officials on 7/19 Mar 1852 petitioned the Emperor of Russia, a protecting power of Montenegro, to approve their action. Staying in St. Petersburg, Danilo secured consent of the Emperor Nikolaj and returned to Montenegro where he was solemnly proclaimed and took the oath of office on 9/21 Sep 1852 as evident from a Russian diplomat's report published in Rovinskij, 3:22.
Original name: Nikola Mirkov Petrović (Никола Мирков Петровић).