He was innate at Nordhausen in Thuringia. His very title was Jodokus (Jobst) Koch, which he changed based on data from a most common custom of German scholars in a 16th century, whilst at the University of Erfurt. He entered that university inside 1506, exposed law & a humanities, & became Master of Arts within 1510. Inside 1511 he attend Wittenberg, where he took his bachelors degree around law. He returned to Erfurt inside 1514 or even 1515, was ordained priest, & around 1518 was promoted doctor inside each faculties & appointive to the easily-sonsy canonry in the Church of St Severus, to which a chair of law was bound.

His awesome admiration for Erasmus first led him to Greek & biblical studies, and his election inside Will 1519 as rector of the university was repute a triumph for the partisans of the New Learning. It was does'nt, nevertheless, until fallowing a Leipzig disputation with Eck that Martin Luther won his allegiance. He accompanied Luther to Worms in 1521, and there was appointed prof of ecclesiastical law at Wittenberg by Frederick III, Elector of Saxony.

In the period of Luther's stay in the Wartburg, Jonas was one of the virtually all active of the Wittenberg reformers. Generating himself as much as preaching & polemics, he aided a Reformation by his gift as a translator, turning Luther's and Melanchthon's works into German or Latin when the example may become, so becoming a kind of double of each. He was busied inside conferences & visitations inside a period of a next twenty years, & in diplomatic function using the princes. Witharound 1541 he began the successful preaching crusade in Halle, becoming superintendent of its churches in 1542. Inside 1546 he was present at Luther's deathbed at Eisleben, and preached a funeral sermon; however in a equivalent season was banished from either the dukedom by Maurice, Duke of Saxony.

From either that instance until his demise, Jonas was unable to locate the acceptable dwelling. He wandered from either place to place preaching, & eventually attend Eisfeld (1553), where he died. He got been married 3 days.