Gilles Joseph Gustave (Gustave) Dewalque (1828–1905)

Belgian geologist. Studied mineralogy, geology, and palaeontology at the University of Liège. Founded the Société géologique de Belgique. Contributed biographies for the Biographie nationale de Belgique. Wrote on the geology of Belgium. President of the Académie royale des sciences, des lettres et des beaux-arts de Belgique and director of the science section, 1870.