Greek philosopher – Pyrrhonism. Pyrrhus of Epirus, Greek general – Pyrrhic victory Pythagoras, Greek mathematician – Pythagorean theorem, Pythagorean triple, Pythagorean tuning, Pythagorean expectation, Pythagorean hammers, Pythagorean trigonometric identity, Pythagoreanism, Neopythagoreanism. Python, Greek mythological character – python. Q Graman Quassi, Surinamese botanist – quassia. Adolphe Quetelet, Belgian astronomer, mathematician, statistician, sociologist - Quetelet rings Antoine Quinquet, French pharmacist and inventor – Quinquet lamp. Vidkun Quisling, Norwegian war criminal – the term "quisling" became a synonym in many European languages for traitor. R Raël, French religious leader – Raëlism. Thomas Stamford Raffles, British governor – Rafflesia. FitzRoy Somerset, 1st Baron Raglan, British nobleman and military officer – Raglan sleeve. Friedrich Wilhelm Raiffeisen, German businessman – Raiffeisenbank. C. V. Raman, Indian physicist – Raman spectroscopy, Raman effect. Srinivasa Ramanujan, Indian mathematician – Ramanujan prime, Ramanujan theta function, Ramanujan's sum, Ramanujan's master theorem, Landau–Ramanujan constant, Ramanujan–Soldner constant, Ramanujan–Petersson conjecture, Rogers–Ramanujan identities, Hardy–Ramanujan number. John Rambo, American literary and film character – a "Rambo" (a reckless person who disregards orders and uses violence to solve problems), "Rambo strategy", "Rambo lawyer" (one who habitually engages in "all manners of adversarial excess, including personal attacks on other lawyers, hostility, boorish and insulting behavior, rudeness and obstructionist conduct" or embraces "a 'take no prisoners' attitude.",) "Rambo knife" (nickname for a Bowie knife in several languages). William John Macquorn Rankine, Scottish engineer, physicist and mathematician – Rankine scale, Rankine cycle. Aleksandar Ranković, Yugoslav politician – Rankovićism. Raphael, Italian painter – Pre-Raphaelite Brotherhood. John William Strutt, 3rd Baron Rayleigh, British physicist and mathematician – Rayleigh criterion, Rayleigh scattering. Maurice Raynaud, French physician – Raynaud's disease. Ronald Reagan, American film actor and president – Reagan Era, Reaganomics, Reagan Doctrine, Ronald Reagan Washington National Airport, , Ronald Reagan Trail. René Antoine Ferchault de Réaumur, French biologist – degree Réaumur. Martin de Redin, Spanish military and politician – De Redin towers. Orville Redenbacher, American businessman – Orville Redenbacher. Dorothy Reed Mendenhall, American physician, and Carl Sternberg, Austrian pathologist – Reed–Sternberg cell. Rehoboam, Hebrew king – 4.5-litre wine bottle (see Wine bottle#Sizes). Eliphalet Remington, American businessman – Remington Arms, Remington Products. André Renard, Belgian politician – Renardism. Louis Renault, French industrialist – Renault. Alfréd Rényi, Hungarian mathematician – Rényi entropy. Ernst Renz, German circus owner – Circus Renz. Richard Réti, Slovakian chess player – Réti Opening. Nicolas-Edme Rétif, French novelist – retifism. Paul Reuter, German-British journalist and businessman – Reuters news agency. Douglas