Johann Lantz or Lanz (1564 – 20 September 1638) was a German mathematician and Jesuit.
[1][2] Born in Tettnang on Lake Constance in 1564, he was admitted as novice in Landsberg in 1589.
After 1609-1610 he left his place to his pupil Christoph Scheiner[2] and moved to the University of Munich.
He analyzed the four genres of numbers, then the astronomic fractions.
[1] He is remembered also by Mario Bettini in his Aerarium philosophiae mathematicae (1648).