Well, then you have this: http://www.surnamedb.com/surname.aspx?name=Grassi
Surname: Grassi
This interesting name has to be described as 'European'. It is is recorded in much the same spelling in the British Isles as Grass, in Germany as Gras, Grass, Grasse, Grassmann, Graser, in France as de Grasse, de Gras, Le Gras, Gras, and diminutives such as Grasot, Grasset, and Gassin, in Italy as Grassi and Grasso, as well as many diminutives such as Grasselli, Grassini, and Grasetti. It has at least three possible origins, dating from the early medieval period. The first is from a nickname from the Old French word "grace", meaning charm, itself from the Latin word "gratia".
