Konrad Hagius (von Hagen) was a German composer. About 1589 he was musician at the court of the music-loving Elector, Johann Wilhelm, at Düsseldorf, went with the Elector Palatine to Heidelberg (c1604), was Kapellmeister at the court of the Count of Holstein-Schwanenburg, etc., and retired in 1615 as court composer to Rinteln.
Konrad Hagius composed psalms, magnmcats and a number of sacred and secular songs, and a book of instrumental pieces, with some by other composers, including Thos. Simpson. (List in Q.-L.)