Johann Daniel Mylius (c. 15831642) was a composer for the lute, and writer on alchemy. Born at Wetter in present-day Hesse, Germany, he went on to study theology and medicine at the University of Marburg. He was the brother-in-law and pupil of Johann Hartmann (1568âÂÂ1613).
In 1616, while still a medical student, Mylius published Duncan Burnet's Iatrochymicus. The ', Mylius' own alchemical work, was published two years later. He is known for the collection ' (1622) of pieces for the lute. In the same year his ' was published. Mylius was the personal physician of Moritz of Hessen and his patrons included Maurice and Frederick Henry of Nassau.