Yuri (ˈjurɪ). 1934–68, Soviet cosmonaut: made the first manned space flight (1961)
Gagarin in American English
(ɡɑːˈɡɑːrɪn, ɡə-, Russian ɡʌˈɡɑːʀjɪn)
noun
Yuri Alekseyevich (ˈjuri ˌælɪkˈseiə vɪtʃ, Russian ˈjuːʀjɪ ʌljɪˈksjejɪvjɪtʃ), 1934–68, Russian astronaut: first human being to make an orbital space flight (1961)