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Grigor Yeghiazaryan (Armenian: Գրիգոր Եղիազարյան; 8 December 1908 − 4 November 1988) was an Armenian composer.
He was born on 8 December 1908 in Blur, Erivan Governorate, Russian Empire (now in Turkey). In 1935, Yeghiazaryan graduated from the Moscow State Conservatory with Nikolai Myaskovsky. From 1936 to 1938, he lectured and also was the head of the training section of the Music College in Leninakan. After 1938, he lived in Yerevan, and gave lessons in the music college and the Yerevan Komitas State Conservatory. He was the head of composition classes and was appointed a professor in 1959.
From 1952 to 1955, he was the chairman of the Armenian Union of Composers. From 1954 to 1960, he was the rector at the Yerevan Komitas State Conservatory. He was the Armenian SSR State Prize winner of 1971. He died on 4 November 1988 in Yerevan, Armenia.