List of Famous people named Leo

Leopoldo Dante Tévez, known as Leo Dan, is an Argentine composer and singer born in Villa Atamisqui, Santiago del Estero Province. He recorded more than 20 albums during his long career during the late 20th century between Argentina and Mexico. His appreciation for Mexican music led him to record with mariachis, and from there he went to international fame. His music was well received by the Mexican public since his voice was a good match to the traditional mariachi sound.

Leo Szilard was a Hungarian-American physicist and inventor. He conceived the nuclear chain reaction in 1933, patented the idea of a nuclear fission reactor in 1934, and in late 1939 wrote the letter for Albert Einstein's signature that resulted in the Manhattan Project that built the atomic bomb. According to György Marx he was one of the Hungarian scientists known as The Martians.

Leo James Terrell is an American civil rights attorney and talk radio host based in Los Angeles, California. He recently became a Fox News Contributor and appears on many shows including Hannity. Previously a life-long Democrat, in a July 2020 interview, he declared his support for President Donald Trump—the first time he declared support for a Republican Party presidential candidate.

Leo Jeremiah O'Donovan III is an American Catholic priest, Jesuit, and theologian who served as the president of Georgetown University from 1989 to 2001. Born in New York City, he graduated from Georgetown, and while studying in France, decided to enter the Society of Jesus. He went on to receive advanced degrees from Fordham University and Woodstock College, and received his doctorate in theology from the University of Münster, where he studied under Karl Rahner. Upon returning to the United States, he became a professor at Woodstock College and the Weston Jesuit School of Theology, before becoming the president of the Catholic Theological Society of America and a senior administrator in the Jesuit Maryland Province.

Leo Bernard Gorcey was an American stage and film actor, famous for portraying the leader of a group of hooligans known variously as the Dead End Kids, The East Side Kids, and, as adults, The Bowery Boys. Gorcey was famous for his use of malapropisms, such as "I depreciate it!" instead of "I appreciate it!"

Leo Leandros is a Greek musician, composer and producer. Born in Astakos, Greece, Leandros left in the 1950s for Germany to pursue a career in singing and composing. He had some success, but shifted his focus to his daughter, Vicky, who had been singing from a very early age. He became her manager, composer and producer when she was 13, and is responsible for her unique training and career. Under his pseudonym Mario Panas he was the co-composer of Après toi, the winning title of the 1972 Eurovision Song Contest, which Vicky performed for Luxembourg.

Leonardo "Léo" Cittadini is a Brazilian footballer who plays for Athletico Paranaense as a midfielder.

Leonardo "Léo" Jaime is a Brazilian singer-songwriter, guitarist, actor and writer, famous for being one of the founding members of the rockabilly band João Penca e Seus Miquinhos Amestrados.

Reona Esaki, also known as Leo Esaki, is a Japanese physicist who shared the Nobel Prize in Physics in 1973 with Ivar Giaever and Brian David Josephson for his work in electron tunneling in semiconductor materials which finally led to his invention of the Esaki diode, which exploited that phenomenon. This research was done when he was with Tokyo Tsushin Kogyo. He has also contributed in being a pioneer of the semiconductor superlattices.

Léo Leroy is a French professional footballer who plays as a midfielder for Ligue 1 club Montpellier.