MICHAEL, a Graeco-Roman jurist and canonist, who was nomophylax, and afterwards metropolitan of Thessalonica. He is said by Pohl (ad Suares. Notit. Basil. p. 138, n. [a.]) to have lived in the 13th century, in the time of Nicephorus Blemmydas, patriarch of Constantinople, and to have been the author of various works. He is cited by Mat. Blastares (Leunc. J. G. R. i. pp. 482, 487), and is known by a short treatise on the degrees of relationship (περὶ τῶν Βαλσαμῶν [qu. Βαθηῶν] τῆς συγγενείας), inserted in the collection of Leunclavius (i. p. 519). By Suarez (who erroneously identifies Chumnus and Domnus), Chumnus is mentioned among the scholiasts upon the Basilica (Notit. Basil. 42), but this seems to be an error. (Böcking, Institutionen, Bonn, 1843, i. p. 108, n. 48; Heimbach, de Basil. Orig. p. 87.)