Pierre Decazes, stage name of Pierre Aderhold (12 July 1932 – 11 August 2020) was a French actor.

Pierre Aderhold gave himself the name "Decazes" for Decazeville, where he spent his childhood. Coming from a family of blue collar workers, Decazes lived in Paris and Lot. His brother, Gérard Aderhold, led the Poissonnerie Aderhold in Rodez and founded the Belondine oyster company within the Groupe Flo. Decazes was the father of two children. His son is writer Carl Aderhold.

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