Defence. Robert Owen, Welsh social reformer and activist – Owenism. P Giuseppe Pace, Maltese bishop – Paceville David Packard and William Hewlett, American business people – Hewlett-Packard Larry Page, American businessman – PageRank algorithm. Reza Shah Pahlavi, Iranian shah – Pahlavi hat. František Palacký, Czech historian and politician – Palacký University, Olomouc. Andrea Palladio, Italian architect – Palladian architecture, Palladian villas, palazzo. Peter Simon Pallas, Russian biologist and botanist – pallasite. Arnold Palmer, British golfer – Arnold Palmer. Pamela, British literary character – Pamela hat. Pamphilus, Italian theatrical character – pamphlet. Pan, Greek mythological character – panflute, the word panic, Peter Pan Peter Pan, British theatrical character – Peter Pan syndrome, Peter Pan collar. Panacea, Greek mythological character – panacea. Pandora, Greek mythological character – Pandora's box. Pantalone, Italian theatrical character – pantalone, pants. Paparazzo, a press photographer in Federico Fellini's film La Dolce Vita – paparazzi. Denis Papin, French inventor – papinian cooking pot, Papin's digester Vilfredo Pareto, Italian economist – Pareto principle, Pareto efficiency, Pareto distribution, Pareto index Bernard Parham, American chess player – Parham Attack. C. Northcote Parkinson, British historian – Parkinson's law. James Parkinson, British physician – Parkinson's disease. Rosa Parks, American activist – Rosa Parks Highway. Antoine-Augustin Parmentier, French agronome – Hachis Parmentier. Sir William Edward Parry, Anglo-Welsh explorer of the Arctic - Parry arc. Blaise Pascal, French mathematician – pascal, Pascal's triangle, Pascal's Wager or Pascal's Gambit, Pascal programming language, Pascal's theorem. Louis Pasteur, French chemist – Pasteurization. Saint Paul – Saint Paul (Minnesota), São Paulo, St Paul's Island, St. Paul's Bay, St. Paul's Bay Tower, and numerous other localities, churches and cathedrals. Vincent de Paul, French humanitarian activist and priest – Society of Saint Vincent de Paul. Antoine de Paule, Maltese knight – Paola, Malta. Wolfgang Pauli, Austrian-Swiss physicist – Pauli exclusion principle. Axel Paulsen, Norwegian figure skater – Axel jump. Ivan Petrovich Pavlov, Russian biologist – Pavlovian conditioning. Anna Pavlova, Russian ballet dancer – Pavlova. John Pazmino, American amateur astronomer — Pazmino's cluster (Stock 23: an open star cluster between the constellations Camelopardalis and Cassiopeia, containing the double star Σ 362). Giuseppe Peano, Italian mathematician – Peano axioms. Mr. Pecksniff, British literary character – Pecksniffian Pelagius, British theologian – pelagianism. Pelé, Brazilian football player – Pelé Law. Jean Charles Athanase Peltier, French physicist – Peltier effect, Peltier coefficient, Peltier plate. William Penn, British-American politician and explorer – Pennsylvania. James Cash Penney, American