Gustav Ipavec (15 August 1831 – 20 August 1908) was a Slovenian composer. A native of Šentjur, he lived in that town for much of his life. He was a physician in his professional life; as a composer he wrote mainly small choral pieces for amateur performers. His son was the composer and physician Josip Ipavec; his brother, Benjamin Ipavec, was also a composer and physician.
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