Kostas Axelos (also spelled Costas Axelos; Greek: Κώστας Αξελός; June 26, 1924, Athens – February 4, 2010, Paris) was a Greek philosopher.

Axelos was born in Athens to a doctor and a woman from an old Athenian bourgeois family, and attended high school at the French Institute and the German School of Athens. He enrolled in the law school in order to pursue studies in law and economics due to dissatisfaction with the philosophy taught at the Philosophical School of the University of Athens, but did not attend. With the onset of World War II Alexos got involved in politics. Then during the German and Italian occupation he participated in the Greek Resistance, and later on in the prelude of the Greek Civil War, as an organiser and journalist affiliated with the Communist Party (1941–1945). He was later expelled from the Communist Party and condemned to death by the right-wing government. He was arrested and escaped.

At the end of 1945 Axelos moved to Paris, France, with around 200 other persecuted intellectuals, where he studied philosophy at the Sorbonne and lived most of his life. From 1950 to 1957 he worked as a researcher in the philosophy branch of CRNS, where he was writing his dissertations, and subsequently proceeded to work in Ecole Pratique des Hautes Etudes. From 1962 to 1973, Axelos taught philosophy at the Sorbonne, and met Jacques Lacan, Pablo Picasso, and Martin Heidegger. His dissertation Marx, penseur de la technique (translated as Marx, the Man Who Thinks Through Technique) tried to provide an understanding of modern technology based on the thought of Heidegger and Marx and was very influential in the 1960s, alongside the philosophy of Herbert Marcuse. Axelos' other dissertation was on Heraclitus, published in 1962.

Kostas Lazarides (born April 14, 1949) is a Greek-born American country music songwriter, known professionally as Kostas. He has written for several country music artists, including Dwight Yoakam, Patty Loveless, and Travis Tritt, and has won eleven awards from Broadcast Music Incorporated (BMI). In addition, he recorded one album, entitled XS in Moderation, on Liberty Records in 1994.

Kostas Lazarides was born in Thessaloniki, Greece. While he was seven years old, he and his family moved to the United States, taking up residence in Billings, Montana. Lazarides eventually began identifying himself by the singular name Kostas.

Kostas was divorced from his wife Hope Evangeline in 2001. They have a daughter named Sofia, who was aged 8 at the time of the divorce. Custody of Sofia was awarded to Kostas. Sofia disappeared on August 25, 2003, while visiting her mother in Nashville, prompting and FBI hunt for her that lasted 6 years. Hope was arrested by FBI agents in Dallas, Texas, on February 24, 2009. She was returned to Tennessee where she was charged with custodial interference and appeared before General Sessions Judge Gale Robinson on March 11, 2009. He currently lives in Belgrade, Montana.

Victor Bérard (1864–1931) was a French diplomat and politician.