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Loren Schoenberg was born in 1958.
Lawrence Schoenberg's birth name is Lawrence Adam Schoenberg.
Ronald Schoenberg's birth name is Rudolf Ronald Schoenberg.
Schoenberg was credited with it's creation, but Alban Berg started using Dodecaphony in 1912, three years before Schoenberg.
Schoenberg did, however, innovate the twelve-tone system.
Gertrud Schoenberg died in 1967.