George Frederick Leycester Marshall (March 27, 1843 - March 7, 1934) was a Colonel in the Indian Army and brother of C. H. T. Marshall and uncle of Guy Anstruther Knox Marshall. He was a naturalist interested in the birds and butterflies of India. Marshall described several new species of butterflies, along with Lionel de Nicéville, and discovered the White-tailed Iora, sometimes referred to as Marshall's Iora. He wrote The butterflies of India, Burmah and Ceylon.
Marshall, G.F.L. and de Nicéville, L. 1883. Butterflies of India, Burmah and Ceylon. Vol. I, Repr.1979, New Delhi, 327 pp.