George William Dumbell QC (17 September 1804 – 13 December 1887) was a British advocate, businessman and philanthropist who was invited to become a Member of the House of Keys serving two different terms (1840–1857 and 1867–1880).

[5] Through a mixture of the financial slump during the latter part of the 18th century, the partner's inexperience and a degree of malpractice, the bank's life-span was short and it ceased operations in 1793 after which Dumbell's father was declared bankrupt.

[5] John Dumbell served a spell of penal servitude in Flint gaol as a consequence of his bankruptcy, following which the family moved to the Isle of Man sometime between 1815 and 1820.

[5] Roper is said to of also been a somewhat colourful character,[6][4][5] having himself been declared bankrupt in Ireland he subsequently went on to become Vicar General of the Isle of Man in 1824.

[4][5] George Dumbell was called to the bar on 13 October 1826 and soon by a mixture of his acuteness and persevering qualities he gained a leading position in his profession, building a comprehensive legal practice.

[4] He was said to be particularly competent in criminal cases, being regarded as a highly thorough advocate and during the mid part of the 19th century performed the role of Clerk to the Justices of the Peace.