Justus Jonas, the Elder, or simply Justus Jonas, was a German Lutheran theologian and reformer. He was a Jurist, Professor and Hymn writer. He is best known for his translations of the writings of Martin Luther and Philipp Melanchthon. He accompanied Martin Luther in his final moments.

The Erfurt Enchiridion is the second Lutheran hymnal. It appeared in 1524 in Erfurt in two competing editions. One of them contains 26 songs, the other 25, 18 of them by Martin Luther, others by Elisabeth Cruciger, Erhard Hegenwald, Justus Jonas and Paul Speratus. While the songs of the Enchiridion could be used in churches, they were intended primarily for singing elsewhere, such as at home, at court, and in guild meetings.