Quevedo, kay VAY doh, Francisco de (1580-1645), was the leading Spanish humanist of the 1600's. He wrote extensively on social, political, religious, and aesthetic problems of Spanish Renaissance life. His works include Life of the Swindler (written about 1605 and published in 1626), a cruelly ironic picaresque novel; Visions (1627), a satirical prose portrait of Spanish society; and hundreds of poems on moral and sentimental themes.