Dubourg was born in London, the illegitimate son of a court dancing master, his mother's identity is unknown. In 1712, at age 9, he performed a Corelli sonata standing on a stool at the home of
Thomas Britton. At age 11, in 1714, he furthered his studies under the celebrated Italian violinist, composer and music theorist
Francesco Geminiani. He performed a sonata at the Queen's Theatre in March 1714, a benefit concert in May at
Hickford's Room, as well as many other performances during the London season. On 17 June 1727 he married Frances, the daughter of musician Bernard Gates at Stanmore, Middlesex. They had one child, a daughter named Elizabeth, who married oboist Redmond Simpson on 22 September 1753, who had one child. Dubourg served as
concert-master from 1728 to 1764 in
Dublin. The deed was witnessed by a woman named
Elen: Du Bourg (sic) of the City of Dublin, Spinster, possibly a relative of Dubourg's. Four years later, a
Deed of Mortgage or Conveyance was registered between the same Frances Barry (noted as the
Widow & Relict of Richard Barry of the City of Dublin, Gent) and Dubourg. The deed recorded that £460 had been paid by Dubourg to Barry concerning separate plots of ground in Capel Street and
Arbour Hill, Dublin. The deed was witnessed by "Peter Gunan of the said City (of Dublin), Instrument Maker", who is known to have tuned and maintained the organ at
Trinity College Chapel during the 1700s. Dubourg was close friends with Handel, and followed the rise of his career in London, as well as the general music scene there from across the Irish Sea. Around 15 May 1736,
Benjamin Victor, theatre manager in London, wrote to Dubourg in Dublin concerning the upcoming marriage of
Frederick, Prince of Wales to
Princess Augusta of Saxe-Gotha an event at which Handel saw a chance to gain Royal Patronage: "...As to the Operas, they must tumble, for the King's presence could hardly hold them up, and even that prop is denied them, for his Majesty will not admit his royal ears to be tickled this season. As to music, it flourishes in this place more than ever, in subscription concerts and private parties, which must prejudice all operas and public entertainments". ==Handel's
Messiah==