Gotthard Erythräus was a German music teacher and composer. His only extant work is Psalmos et cantica varia notas s. tonum musicum adstrictos ... Herrn D. Martini Lutheri und anderer gottesfürchtiger Männer Psalmen und geistliche Lieder, welche man als die fürnehmsten durch das ganze Jahr in der christlichen Gemeine pfleget zu singen. Apparently Erythräus's work did attract some attention, because in 1610 Michael Praetorius took a section from it for the seventh part of his Musae Sioniae.