LASSUS, Orlando di, born at Mons in the first half of the 16th century. His real name was probably Delattre, but the form de Lassus seems to have been constantly used in Mons at the time, and was not his own invention. He had no fixed mode of writing his name, and in the prefaces to the first four volumes of the ‘Patrocinium Musices,
’ signs himself differently each time,—Orlandus de Lasso, Orlandus di Lasso, Orlandus di Lassus, and Orlandus...