Pierre Chrétien (1846 – 15 June 1934, in Nay, Pyrénées-Atlantiques) was a French entomologist who specialised in Lepidoptera.
He was a member of Société entomologique de France.
& A. Lastuvka & van Nieukerken, 2013 is "named in honour of Pierre Chrétien (1846–1934), who discovered nepticulid mines on Bupleurum, including those on Bupleurum rigidum, and the first author to describe a number of Mediterranean species that are now placed in Trifurcula (Glaucolepis)."
His collection is held by National Museum of Natural History in Paris.
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