'Diogenes' (Διογένης) is a Greek name shared by several important historical figures:
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Diogenes Apolloniates (c. 460 BC), philosopher
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Diogenes of Sinope (412-323 BC), better known as ''Diogenes the Cynic'' or simply ''Diogenes''
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Diogenes the Stoic (Diogenes of Babylon, Diogenes of Seleucia) (c. 150 BCE)
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Diogenes of Judea (fl. c. 100-76 BC), general and advisor of Hasmonean king Alexander Jannaeus
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Diogenes Laertius (between 200-500 CE), historian
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Diogenes (1st century CE), Greek merchant and explorer
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Diogenes, bishop of Byzantium, 114-129 CE
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Diogenes of Oenoanda (2nd century CE), Epicurean
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Diogenes (11th century), duke of Syrmia
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Diogenes (bishop of Edessa) died 411-412
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Diogenes syndrome, personality disorder.
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Diogenes Verlag, a Swiss publishing house.