There are four artists with the name Ono: 1. Former project of Czech musicians Roman Putnar and Petra Voldanova. OnO was founded and ended in 2004 after recording two songs. 2. Yoko Ono Lennon (born February 18, 1933) is a Japanese musician and artist best known as the widow of John Lennon of The Beatles. Her early work as a conceptual artist put her on the map in avant-garde circles before marrying the leader of the Beatles.