Renowned tenor singer, the father of Erik Anton Valdemar Siboni. The elder Siboni was born at Fprli, Denmark, and made his debut in 1797 at Florence, then appeared at Genoa, Milan and Prague, and in 1806 went to London, where he sang with striking success the following three seasons. Siboni was well known and popular as a singer in London, Vienna, Prague, Naples and St. Petersburg. His compass was two octaves, and he was an excellent actor. Many of Paer's tenor parts were writen for him. In 1819 he was appointed director of the Royal Opera and of the Copenhagen Conservatory, a position which he held until his death.