Luís Filipe Lindley Cintra ComL GCIP (5 March 1925 – 18 August 1991) was a prominent figure in Portuguese philology and linguistics. A prolific writer with over 80 published works, he was a keen student of the historical differentiation during the 14th and 15th centuries between literary Portuguese and Castilian Spanish (1958). Another special interest was the relationship between Galician and Portuguese, as evinced by his study of the dialects of Madeira (1990) and his plan, together with Manuel de Paiva Boléo and , for a linguistic-ethnographic atlas of Portugal and Galicia (1960). He is also co-author, with , of a major work on Portuguese grammar, the Nova Gramática do Português Contemporâneo.