There was also a Johann Gottlob Wern(h)er (1719–1781) (see German Wikipedia; German theologian); one presumes he did not dabble in liturgical music also, but the possibility should be raised as a caveat anyway... The composer is born October 4, 1777, Hayn (near Leipzig), Germany and died July 19, 1822, Chemnitz, Saxony. See http://www.hymntime.com/tch/bio/w/e/r/werner_jg.htm
