In the French Revolution scene of History of the World, Part I, Mel Brooks appears to re-use Harvey Kormann's character of Hedy/Hedley Lamar from Blazing Saddles.
This is underscored by the re-use of the "mispronounced name" gag: The character (also played by Harvey Kormann) is frequently addressed as "Count de Money" but insists that it be pronounced as "Monet".
Online searches disagree on which is the correct spelling of the name, although Wikipedia and IMDB both show "Monet".
(To my mind, the gag would be funnier if it were actually spelled "Money" a la Hyacinth Bucket).
It would be great to have a definitive answer citing either an original script, or on-screen credits.