This isn't really a 'famous bearer' of the name Leo, but I've heard the name from a book called Stargirl, from a new show on Netflix called Legend of Quest: Monsters of Myth, and from a few other places. I have always liked the name and my best friend is named Leo.
Leo Sirota was a Jewish pianist born in Kamianets-Podilskyi, Podolskaya Guberniya, Russian Empire, now Ukraine. Leo Sirota began studying piano at the age of five. By the age of nine he was already giving concerts and came to the attention of Paderewski, who invited the boy to study with him. Sirota's parents, however, felt he was too young, and so he attended the conservatories in Kiev and, later, Saint Petersburg. However, in 1904 he went to Vienna to study with Ferruccio Busoni. He worked as rehearsal pianist with the conductor Jascha Horenstein, whose sister, Augustine Horenstein, he married. Sirota's Vienna debut concert must have been a memorable occasion: it comprised the Mozart sonata for two pianos with Busoni playing the other piano, followed by the Busoni Piano Concerto, with Busoni conducting, and ended with the two piano version of the Liszt Don Juan Fantasy. Sirota and his family settled in Japan in 1929, staying there for 16 years, teaching and giving recitals. He was a piano teacher of Minoru Matsuya (1910–1995) and Takahiro Sonoda (1928-2004). While in Japan, he championed Yamaha pianos against the prevailing fashion in Japan for Bechstein and Steinway instruments.
Leo is the name of Tony Blair's youngest son (Leo George) born in 2000. He was the first legitimate child born to a serving Prime Minister for 150 years.
Leo Baekeland was a Belgian-American chemist and inventor; he created Bakelite, one of the earliest and most successful plastics.Leo Burnett was a revolutionary American advertising executive, one of the first to create an single, outstanding image to symbolize a product. Among his creations are the Pillsbury Doughboy, Jolly Green Giant, Tony the Tiger, Marlboro Man, and other ad icons.Leo Szilard was a Hungarian-American physicist involved in the Manhattan Project. He first theorized the nuclear chain reaction.