De Haan
The taxon authority De Haan may refer to:
- André A.J. de Haan (born 1937, A.de Haan), mycologist
- Jacob van Breda de Haan (1866–1917, Breda de Haan), Dutch mycologist
- Wilhem de Haan (1801–1855), Dutch zoologist, also published as Guilielmo De Haan