Swainson is a family name of English origin. It may refer to:
People
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Charles Swainson (naturalist), (1841-1913), Rector of High Hurst Wood and later of Old Charlton, author of books on birds, weather and folk-lore
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Charles Anthony Swainson (1820–1887), English theologian
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Gina Swainson (born 1958), Bermudan first runner-up in the 1979 Miss Universe contest
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Isaac Swainson (1746–1812), English patent medicine entrepreneur
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John Swainson (1925–1994), American politician
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William Swainson (1789–1855), English naturalist
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William Swainson (lawyer) (1809–1884), English lawyer
Places
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The Swainson Island Group, which includes Swainson Island, Tasmania, Australia
Biology
- Birds
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Swainson's flycatcher, Myiarchus swainsoni
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Swainson's francolin, or Francolinus swainsonii
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Swainson's hawk, Buteo swainsoni
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Swainson's sparrow, Passer swainsonii
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Swainson's thrush, Catharus ustulatus
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Swainson's warbler, Limnothlypis swainsonii
- Butterflies
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Swainson's crow, Euploea swainson
- Plants
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Swainsona, large genus of flowering plants native to Australia
