My translation:94. ..........: eine fruehe Erwaehnung in Schreiben Wippern an "SS-u. Polizeifuehrer - Reinhardt", 6.6.42, Kermisz, "Akcie" i "Wysiedlenia" S. 182; ein Formular gab es spaetestens seit dem 15.6.42, IfZ Fb 95/23, Bl.576. Die Entstehungsgeschichte des Namens "Aktion Reinhard" ist vermutlich darauf zurueckzufuehren, dass ein Stichwort fuer die auswaertigen Materialanforderungen nach Eigentum ermordeter Juden benoetigt wurde. Zunaechst war dies "katholische Aktion", da sich das Materiallager in einem Bibiotheksmagazin der Katholischen Universitaet Lublin befand. Mit dem Anschlag auf Heydrich wurde dieser Name in "Aktion Reinhard" umbenannt; vgl. Empfangsbestaetigung DAW Lublin, 24.5.42, IfZ Fb 95/23, Bl. 566; Rajca, Lubelska filia S.269. Abwegig erscheint die Theorie von Uwe Dietrich Adam: The Gas Chambers, in: Francois Furet (Hg), Unanswered Questions. Nazi Germany and the Genocide of the Jews. 1989, S. 134-154, der Name ginge auf den StS. im Reichsfinanzministerium Reinhardt zurueck; vgl. Richard Breitman/Shlomo Aronson: Eine unbekannte Himmler-Rede vom Januar 1943, in : VfZ 38 (1990) S. 337-348.
The above footnote claims that the code-name for the store of Jewish property held at Lublin was changed from "Catholic Operation" to "Operation Reinhardt" as a result of the attack on Heydrich in Prague, which occurred on 27 May 1942, and refers to a receipt from the German Armament Works in Lublin, presumably for items sourced from the store of Jewish property held in the library of the Catholic University, dated three days before that attack, ie 24 May. It is not clear from Pohl's reference whether that DAW receipt was still using the code-name "Catholic Operation"; presumably it was, if the change of code-name to "Operation Reinhardt" occurred only after 27 May.....an early mention in a note by Wippern to "SS and Police Leader - Reinhardt", on 6 June 1942, "Akcie" I "Wysiedlenia" p. 182; a formula existed at the latest since 15 June 1942, IfZ Fb 95/23, folio 576. The history of the origin of the name "Aktion Reinhard" is probably to be traced to the fact that a key-word was needed for the external orders for items from property of the murdered Jews. At first this was called "Catholic Operation", because the stock of material was located in a library store-room of the Lublin Catholic University. With the attack on Heydrich this name was changed to "Operation Reinhard"; see confirmation of receipt from the DAW [German Armaments Works] Lublin, 24 May 1942, IfZ Fb 95/23, folio 566; Rajca, Lubelska filia p. 269. The theory of Uwe Dietrich Adam, in "The Gas Chambers" ( in Francois Furet (ed) "Unanswered Questions: Nazi Germany and the Genocide of the Jews", 1989, pp. 134-154), that the name goes back to the State Secretary in the Reich Ministry of Finance, Reinhardt, seems incorrect; see Richard Breitman / Shlomo Aronson, "An Unknown Himmler Speech of January 1943", in VfZ 38 (1990), pp. 337-348.
I have not read the IfZ article by Breitman and Aronson referred to in the footnote, but presumably the "unknown" Himmler speech on January 1943 was the one in which he claimed (incorrectly) that Heydrich used the unusual spelling "Reinhardt" for his given name (unusual because that spelling is generally used only in surnames, which was the basis for the Uwe Dietrich Adam theory referred to).