Per Gunnar Fredrik de Frumerie (20 July 1908 in Nacka, Stockholm County – 9 September 1987 in Täby, Stockholm County) was a Swedish composer and pianist. He was the son of architect Gustaf de Frumerie and Maria Helleday. After studying piano in Stockholm and Vienna, he studied under Alfred Cortot in Paris. He then studied at the Royal College of Music, Stockholm 1923-1928. His works for piano are technically difficult. His repution in Sweden has never been strongly established.

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