The significance of characters names can be found in the enotes character descriptions. The descriptions are as follows:
"Helmholtz Watson, who was named by Huxley after John B. Watson, the founder of the Behaviorist School of psychology."
"Bernard Marx is named after a person whose ideas greatly influenced the society in Brave New World: Karl Marx." (Marx was the founder of the idea of communism.)
"Huxley took the name Hoover from U.S. President Herbert Hoover, and Benito from the Italian fascist dictator Benito Mussolini."
"Mustapha Mond has a name that is a play on the words “Must staff a mond.” (“Mond” is derived from the French word “monde,” which means world.)"