Wikipedia:
Giorgio Antoniotti originated from a noble Genoese family living in Milan. He fled to Genoa as a sympathizer of the Spanish during the War of the Spanish Succession and was a member the Spanish army for an extended period. He then traveled to numerous noble courts in Europe and visited cities such as Vienna, Paris, Madrid and Lisbon. According to François-Joseph Fétis, he is said to have lived in the Netherlands (Holland) for several years. Later he spent more than 20 years of his life in London, where his work "l'Arte armonica" was published in 1761. He returned to Milan in 1770. There he was concerned with the question of whether it was possible to play all the notes of the scale at the same time without sounding unpleasant. This problem was examined by Padre Giovanni Sacchi and recognized as legitimate. Antoniotti died in Milan in 1776.
Works published at IMSLP.
1. Sonata a violoncello e basso (unpublished manuscript in Durham Cathedral, MS E. 24(v), iv.6).
2. concerto por violoncello Parte Principale con 4° Violini e due Alto Viole, Basso Continuo e Fondamento per Cimbalo, e Contra Basso, Durham Cathedral MS E.27.
3. XII Sonata, le Prima Cinque a Violoncello e Basso, e le Altre Sette a due Violoncelli Overo due Viole di Gamba (Amsterdam, Michel-Charles Le Cène, cited in the 1737 catalog).

Note: Translated from the German version of Wikipedia into English.