Gratian, a celebrated canonist of the 12th century, born at Chiusi, Tuscany; was a Benedictine monk at Bologna, and compiled the “Decretum Gratiani” between 1139 and 1142.
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Granville, George Leveson-Gower * Gratianus, Augustus