Duncan
The taxon authority Duncan may refer to:
- James Duncan (1804–1861), English entomologist
- Kelvin W. Duncan, New Zealander carcinologist
- Peter M. Duncan, Australian palaeontologist
- Peter Martin Duncan (1824–1891), British zoologist and paleontologist
- Russell A. Duncan (fl. 2002, R.A.Duncan), mycologist
- Thomas Duncan (born 1948, T.Duncan), botanist