1600, in the meaning defined at sense 1
Latin, from duum (genitive of duo two) + vir man
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Cite this Entry
“Duumvir.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/duumvir. Accessed 7 Aug. 2022.
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Britannica.com: Encyclopedia article about duumvir
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