Gerard Nolst Trenité (20 July 1870, Utrecht – 9 October 1946, Haarlem), was a Dutch observer of English.
Nolst Trenité published under the pseudonym Charivarius (which he pronounced irregularly as [?a?ri'va?rij?s]).
He is best known in the English-speaking world for his poem The Chaos which demonstrates many of the idiosyncrasies of English spelling and first appeared as an appendix to his 1920 textbook Drop Your Foreign Accent: engelsche uitspraakoefeningen.
The subtitle of the book means "English pronunciation exercises" (this title has the pre-1947 Dutch spelling engelsche instead of the currently-accepted usage Engelse).