Hucbald

medieval French musical theorist, scholar, and humanist.
Found on http://www.britannica.com/eb/a-z/h/78

Hucbald

Hucbald (hŭk'bôld) , c.840–930, Flemish monk, composer and writer, formerly thought to be the author of the Musica enchiriadis (see polyphony). He wrote a musical treatise, De institutione harmonica, but he is more important as a biographer of saints.
Found on http://www.infoplease.com/ce6/people/A0824429.html
No exact match found