Edward Umfreville
Edward Umfreville( born c. 1755 – fl. 1771– 1789) came to Canada in 1771 to work as a writer for the Hudson's Bay Company.
He came to York Factory and almost immediately was transferred to Fort Severn.
There, he and Andrew Graham designed a comprehensive plan listing long term requirements for the inland posts that the company proposed to establish.
While at Fort Severn in 1774 Umfreville assisted Samuel Hearne with the requirements for a proposed post at Cumberland House, Saskatchewan.
In 1775, Umfreville was transferred back to York Factory where he became second in command until 1782 when the fort was captured by the French led by Jean- François de Galaup.
The personnel and the staff of the fort were sent back to France as prisoners.
The Treaty of Paris in 1783 freed Umfreville and he arrived in London.
Disputes between him and the HBC ended his tenure there and he left for Quebec.
By May 1784 he was employed by the North West Company and was searching for an alternate route from Lake Superior to Lake Winnipeg.
Although Umfreville succeeded, the Nor’Westers continued to use the route via the Grand Portage since the Americans were not enforcing their rights under the treaty of Paris.
In 1784, Umfreville was in Saskatchewan at a fort near Frenchman Butte and, although in the employ of the NWC, advising the HBC to pursue inland forts such as those the Nor’Westers were operating out of Fort Kaministiquia.
In 1788 he quit the NWC and tried to re-sign with the Hudson's Bay Company.
This was unsuccessful and the publishing of his book," The present state of Hudson ’s Bay..." in 1790 was widely critical of the Company.
His whereabouts from this point in time are unknown.
The book ’s ill nature reflected the author ’s disappointment over not obtaining a command at the HBC but also did provide knowledge of parts of Canada that was lacking at that point in time.
Jack Campbell (cricketer)
Jack Oliver Ian Campbell( born 11 November 1999) is an English cricketer.
In July 2018, he played for the England under- 19 cricket team against South Africa.
He made his first- class debut on 26 March 2019, for Durham MCCU against Durham, as part of the Marylebone Cricket Club University fixtures.
Joseph B. McCormick
Joseph B. McCormick is a physician, scientist, and educator from the United States.
Jack Oliver (scientist)
John" Jack" Ertle Oliver( September 26, 1923 – January 5, 2011) was an American scientist.
Oliver, who earned his PhD at Columbia University in 1953, studied earthquakes and ultimately provided seismic evidence supporting plate tectonics.
In the 1960s, Oliver and his former graduate student, Bryan Isacks, set up seismographic stations in the South Pacific to record earthquake activity, and the data collected led to the insight that part of the ocean floor was being pushed downward.
Michael Bearpark
Michael Bearpark is an English scientist and musician.
David Johnson-Davies
David Johnson- Davies is a British computer scientist and journalist.
Ransom Stephens
Ransom Stephens is an American scientist and author.
Jack Cooper (English musician)
Jack Oliver Cooper( born February 1980) is an English singer, songwriter and guitarist.
Currently a member of Modern Nature, Cooper was previously a member of The Beep Seals, Mazes and Ultimate Painting.
Jack Oliver (weightlifter)
Jack Oliver( born 4 January 1991) is a weightlifter competing in the 77 kg category, representing England and Great Britain.
Oliver represented England at the Commonwealth games in Delhi in 2010, and competed in his first World Weightlifting Championships for Great Britain in Paris, France in 2011.
In 2012 Oliver competed in the European Weightlifting Championships in Bucharest, and was later selected to represent Team GB at the 2012 Summer Olympics.
George Coupland
George Michael Coupland( born 20 December 1959 Dumfries)
FRS is a Scottish plant scientist, and Research Scientist and Director of the Max Planck Institute for Plant Breeding Research.

Question: Are Edward Umfreville and Jack Oliver (scientist) both from the same country?
Answer: no