Eustahija Arsić was born in 1776 to the Serbian Cincić family in Irig, then part of the southern Hungary (Habsburg Empire).
[1] She had an excellent education and learned to speak several languages, Hungarian, German, Romanian, Church Slavonic, Italian, Latin, and some English.
Her second husband was Toma Radovanović, a wealthy Serbian merchant in Karlovac (Croatia) who bought his title of nobility from the Viennese court.
Eustathija Arsić's home in Arad had a reading room, often galvanized by the presence of political and other émigré Serbs, including Dositej Obradović.
In his book "Traveling through Serbia in the Year 1829" (Reise in Serbien im Spatherbst 1829; 2 vols., Berlin, 1830), Otto Ferdinand Dubislav von Pirch (1799–1832) mentions that Arsić has translated works by Voltaire, Wieland and James Thomas.