He was born at Dahlen in Jülich, and studied in Cologne. Having entered the Order of Jesus, he taught poetry and rhetoric in the Lower Rhine region. In 1648 he took his final vows, and acted as a preacher in Cologne, Paderborn and Trier. He died, aged 75, in Cologne.
- Also Jakob, or Jacobus Masenius; he used a pseudonym Joannes Semanus.
- James J. Mertz, John P. Murphy, Jesuit Latin Poets of the 17th and 18th Centuries: an anthology of neo-Latin poetry (1989), p.153.
- Herbermann, Charles, ed. (1913). "Christoph Brouwer". Catholic Encyclopedia. New York: Robert Appleton Company..
- "Lauder, William (d.1771)". Dictionary of National Biography. London: Smith, Elder & Co. 1885–1900.
- Leonard Foster, Neo-Latin Tradition and Vernacular Poetry, p. 100, in Gerhart Hoffmeister (editor), German Baroque Literature: The European Perspective (1983).
- Richard Dimler, Jakob Masen's Imago figurata From Theory to Practice. Emblematica Vol. 6(2) 1992, 283-306.
- (in German) http://www.kirchenlexikon.de/m/masen_j.shtml