WIKIPEDIA:

“ Bobby Darin (born Walden Robert Cassotto; May 14, 1936 – December 20, 1973) was an American singer who performed in a range of music genres, including pop, rock, jazz, folk and country.
He started as a songwriter for Connie Francis, and recorded his own first million-seller "Splish Splash" in 1958. This was followed by "Dream Lover", "Mack the Knife" and "Beyond the Sea", which brought him world fame. In 1962, he won a Golden Globe for his first film Come September, co-starring his wife Sandra Dee.
Through the 1960s he became more political, and worked on Bobby Kennedy's presidential campaign, being present on the night of his assassination. This affected him and sent him into a period of seclusion.
Although he made a successful television comeback, his health was starting to fail, as he had always expected, following bouts of rheumatic fever in childhood. This knowledge had always spurred him on to exploit his musical talent while still young. He died at 37, following a heart operation in Los Angeles.

Early years
Darin was born in The Bronx. His maternal grandfather, Saverio Antonio Cassotto, was of Italian descent. His maternal grandmother, Vivian Fern (Walden), was of English ("Old Yankee") and Danish ancestry. [......] ”

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