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 (ca 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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