François-Romain Thollon was a Parisian botanist who left his role as assistant head of the School of Botany in the Muséum d'Histoire Naturelle, Paris, to work in Gabon and the Congo from 1882. He served as a member of the de Brazza mission and sent large consignments of plants to the Muséum d'Histoire Naturelle in Paris. He also made zoological collections and a number of species are named in his honour. Thollon remained in Congo for the rest of his life.

Sources:
1897, Bulletin de la Muséum d'Histoire Naturelles de Paris, 3: 73, 115-116
F.N. Hepper and F. Neate, 1971, Plant Collectors in West Africa: 79
G. Sayre, 1975, "Cryptogamae Exsiccatae: an annotated bibliography of exsiccatae of algae, lichens, hepaticae, and musci. V. Unpublished Exsiccatae: I. Collectors", Memoirs of the New York Botanical Garden, 19(3): 404.