The particles that make up every proton are named after a line from Finnegans Wake

In 1964, physicist Murray Gell-Mann proposed that protons and neutrons are built from smaller particles, and already had a sound in mind for them: 'kwork.' Searching for a spelling, he found the line 'Three quarks for Muster Mark!' in James Joyce's dense novel Finnegans Wake, and adopted 'quark,' reinterpreting Joyce's line as a barman's shout for three quarts of beer to justify the pronunciation. Six quark types are now known, still grouped in the sets of three the name half-jokingly predicted.

— Murray Gell-Mann, A Schematic Model of Baryons and Mesons — Physics Letters, 1964