Ratti is an Italian surname. Notable people with the surname include: Achille Ratti (1857–1939), Pope Pius XI Carlo Ratti (born 1971), Italian architect, engineer and inventor Carlo Giuseppe Ratti (1737–1795), Italian art biographer and painter Eddy Ratti (born 1977), Italian former cyclist Eugenia Ratti (born 1933), Italian soprano Filippo Walter Ratti (1914–1981), Italian screenwriter and film director Francesco Ratti (1819-?), Italian engraver Giovanni Agostino Ratti (1699–1755), Italian painter Lorenzo Ratti (ca. 1589–1630), Italian baroque composer Héber Ignacio Ratti (born 1994), Uruguayan footballer James Ratti (born 1991), Welsh rugby union player Julia Ratti (born 1969), Democratic member of the Nevada Senate Lorenzo Ratti (1589-1630), Italian baroque composer Nico Ratti (born 1993), Argentine footballer Ratti Petit (1906-1988), Indian painter, photographer, writer and composer Steven H. Ratti (born 1956), former United States Coast Guard officer Michael Ratti (born 1980), Rat Pot, mentor and idol of the RaKrug Italian-language surnames