Guglielmo (ɡuʎˈʎɛlmo). 1874–1937, Italian physicist, who developed radiotelegraphy and succeeded in transmitting signals across the Atlantic (1901): Nobel prize for physics 1909
Marconi in American English
(mɑrˈkoʊni; Italian mɑʀˈkɔni)
Marchese Guˈglielmo (guˈljɛlmɔ) 1874-1937; It. physicist: developed wireless telegraphy