Eleonore's daughter, Princess Anna Maria, later became Princess consort of Liechtenstein as the wife of Joseph Wenzel I. Eleonore was born on 4 May 1661 in Prague to Count Michael Oswald von Thun und Hohenstein (1631-1694) and his first wife, Countess Elisabeth von Lodron (1635–1688).

They had eleven children: On 12 March 1718 her husband ascended the throne as the reigning Prince of Liechtenstein, thus making her the Princess Consort.

She accompanied her husband on his diplomatic and political missions throughout the Holy Roman Empire and Western Europe, including in Rome and Barcelona.

While staying in Rome, Arsenio di San Antonio dedicated his Catholic devotional book, Stimulo di divotione verso la santissima Vergine e suo sacro scapolare, to Eleonore.

[1] In Spain, she accompanied her husband while he served as the Chief Intendant and Prime Minister of Archduke Karl of Austria, during the War of Spanish Succession.