Denim (twill weave fabric mostly used for jeans and jackets): City of Nimes, France. You can hear denim in "de Nimes" when you say "serge de Nimes" (cloth from Nimes).

Decibel (a measure of sound intensity): Alexander Graham Bell (1847-1922).

Derby (type of horse race): Edward Stanley, 12th earl of Derby, founded the race, in 1780.

Diesel (fuel and engine): Rudolf Diesel (1858-1913), German automotive designer.

Eggs Benedict (toasted English muffin topped with ham and a poached egg and hollandaise sauce): Commodore E. C. Benedict (1834-1920), American yachtsman and banker.

Fallopian tube (part of the female reproductive tract): Gabriel Fallopius (1523-1562), Italian anatomist.

Ferris wheel (an amusement ride): George Washington Gale Ferris (1859-96), American engineer.

Frisbee (flying plastic disc): William Russell Frisbie, founder of Frisbie Pie Company.

Galvanize (coating a piece of metal with zinc): Luigi Galvani (1739-1798), Italian physiologist.

Geiger counter (a radiation detector): Hans Geiger (1882-1945), German physicist.

Graham cracker (semisweet whole-wheat cracker): Sylvester Graham (1794-1851), American dietetic reformer.

Grog (rum diluted with water): Old Grog, nickname of Sir Edward Vernon (1684-1757), British admiral.

Guillotine (instrument of execution by decapitation): Joseph Ignace Guillotin (1738-1814), French physician.

Guy (an informal term for a youth or man): Guy Fawkes (1570-1606), British terrorist.