Spaun married Franziska Roner Edle von Ehrenwert (17 July 1795 - 31 January 1890), daughter of landholder and military captain Joseph Roner Edler von Ehrenwert on 14 April 1828 in Vienna.
He was raised to the Austrian nobility on 25 August 1859 (Adelsbrief on 2 November 1859) and assumed the title Freiherr (baron).
At the Vienna seminary he met Franz Schubert, eight years younger than himself, and they developed a lifelong friendship.
Spaun supported Schubert financially, enabling the young composer to attend the opera and theater, and providing him with a supply of music paper.
The patronage lasted to the end of Schubert's life, and Spaun hosted the final Schubertiade on 28 January 1828.