Hay

The taxon authority Hay may refer to:

Arthur Hay, 9th Marquess of Tweeddale (1824–1878), also known as Viscount Walden, Scottish ornithologist
Oliver Perry Hay (1846–1930), U.S. herpetologist, ichthyologist, and paleontologist
William Delisle Hay (c. 1853–?, W.D.Hay), British botanist
William Perry Hay (1871–1947), U.S. zoologist, son of Oliver Perry Hay
William Winn Hay (1934–2022), U.S. paleontologist and geologist

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