Oswald von Eck was the son of Leonhard von Eck and his wife Felicitas von Freyberg. He studied at the universities of Ingolstadt and Bologna. His father Leonhard was one of the largest landowners in Bavaria and as his only son, Oswald inherited land, money and goods in abundance, including his parents’ extensive library.
This wealth did not last, however, and towards the end of his life his possessions, including the library, were auctioned off. He died in 1573 in Regensburg.
Oswald was responsible for the copious annotations and visual marginalia. These can be dated to between February 1540 and February 1541, when he was a student in Ingolstadt.