Nikola Smiljanić was born in the village of Badovinci around 1760. (or 1777), and grew up in Belotić and Šabac. Nikola Smiljanić was adopted by Jeka Radojicina, a widow, who was engaged in trade in Šabac. She educated and married Nikola Smiljanić, after which he was ordained a deacon and later a priest. As a deacon, Nikola Smiljanić was for a time a teacher in Belotić.
Archpriest Nikola Smiljanić was married to Mitra, the daughter of Prince Mihailo Ružićić from Metković in the Počer principality of Šabac nahija, whose scribe at one time was Miloš Stojićević, Stojićević’s progenitor.
Duke Nikola Smiljanić of Kitogkitska participated in both the First and the Second Uprising 
Duke Nikola Smiljanić was poisoned by Marko Štitarac on the orders of Prince Miloš.
Archpriest Nikola Smiljanić had a daughter who married Jovan Radovanović, a merchant in Šabac called “Ćurčija”.