Retzius is a surname. Notable people with the surname include:
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Anders Jahan Retzius (1742–1821), Swedish naturalist
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Anders Retzius (1796–1860), Swedish anatomist; son of Anders Jahan Retzius
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Gustaf Retzius (1842–1919), Swedish anatomist, liberal publicist; son of Anders Retzius
See also
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Retropubic space, also known as "Retzius' space"
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Striae of Retzius, named after Anders Retzius
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Retzia, genus of plant in the family Stilbaceae; named after Anders Jahan Retius
