Jules François Simon (French pronunciation: [ʒyl simɔ̃]; 31 December 1814 – 8 June 1896) was a French statesman and philosopher, and one of the leader of the Opportunist Republicans faction.

Simon was born at Lorient. His father was a linen-draper from Lorraine, who renounced Protestantism before his second marriage with a Catholic Breton. Jules Simon was the son of this second marriage. The family name was Suisse, which Simon dropped in favour of his third forename. By considerable sacrifice he was enabled to attend a seminary at Vannes, and worked briefly as usher in a school before, in 1833, he became a student at the École Normale Supérieure in Paris. There he came in contact with Victor Cousin, who sent him to Caen and then to Versailles to teach philosophy. He helped Cousin, without receiving any recognition, in his translations from Plato, and in 1839 became his deputy in the chair of philosophy at the University of Paris, with the meagre salary of 83 francs per month. He also lectured on the history of philosophy at the École Normale Supérieure.

Judge Jules (born Julius O'Riordan, 26 October 1966, London) is a British dance music DJ and producer, known for his DJ activities and popular radio show which achieved global success.

Jules was educated at Highgate Wood Secondary School, a state school in Highgate Wood in North London and University College School, an independent school for boys in Hampstead (also in North London), followed by the London School of Economics (LSE), where he studied law. During his time at university, Jules started hosting small parties where he was the DJ. Due to his field of study, the stage name of "Judge Jules" was born. He graduated from the LSE with Lower Second Class Honours. He speaks near fluent Spanish.^{[citation needed]}.

Judge Jules began DJing professionally back in 1987. He was quickly hired by the then-pirate radio station Kiss FM. He has been on Radio 1 since October 1997. When he first arrived, his show went out between 17:00 and 19:00 on Saturday evenings, ahead of Danny Rampling's show. From 31 July 2004, after the departure of Seb Fontaine from the station, his show was moved to between 19:00 and 21:00 on Saturday nights, ahead of Tim Westwood. The show was widely advertised as, "The UK's Saturday Warmup", or "The Weekend Warm-Up". One of the most infamous jingles used on the show during this time described it as, "The Sound Of Saturday Night". The show kept this slot until September 2007.