John Temple (surgeon)
Sir John Graham Temple is a British surgeon, a former President of the Royal College of Surgeons of Edinburgh.
John Graham Nicholls
John Graham Nicholls FRS is a British/Swiss physiologist.
John Graham MacDonald
John Graham MacDonald( 1834–1918) was an explorer and pioneer in Queensland, Australia.
Jack Graham (footballer, born 1873)
John Graham (12 April 1873 – April 1925) was an English footballer.
John R. Graham (footballer)
John R. Graham was an English professional footballer who played as a forward.
Tom Markham
Thomas Joseph( Tom) Markham( 14 December 1878- 15 June 1939) founded two Gaelic Athletic Association clubs in Dublin.
After his death, funds were collected to provide the Tom Markham Memorial Cup, which was awarded annually to the county which won the All- Ireland Minor Football Championship from 1940 to 2013.
John Graham Wallace
John Graham Wallace( born 23 August 1966) is an English author and illustrator of children's picture books.
John Graham White
John Graham White( born 1943) is a Professor Emeritus of Anatomy and Molecular Biology at the University of Wisconsin – Madison.
John Graham (footballer, born 1926)
John R. Graham( born 1 April 1926) is an English former professional footballer who played as a forward.
John D. Graham
John D. Graham( December 27, 1886 Kiev, Russia – June 27, 1961 London, England) was a Russian Empire- born American Modernist/ figurative painter, collector and mentor of modernist artists in New York City.
Born Ivan Gratianovitch Dombrowsky in Kiev, Russian Empire into an aristocratic family, he studied law before serving as a cavalry officer in World War I.
He was briefly imprisoned after the Bolsheviks came to power in 1918 in the Russian Revolution, and fled to Warsaw, returning to fight with" the Whites".
After the resistance collapsed, in 1920 he immigrated to the United States with his second wife.
He soon adopted John as the English version of his first name, and took John D. Graham as his legal name when he became a US citizen in 1927.
He studied painting for the first time in his 30s, becoming deeply interested in modernism.
In addition to gaining attention for his own work, he championed the new movement as a collector and curator.
He was a mentor to a younger generation of American artists, who developed the style of Abstract Expressionism in the New York area.
In the 1940s and 1950s, Graham developed a new figurative style derived from classical masters, which he first showed in paintings and drawings of Russian soldiers.
He died in London, England.

Question: Are Tom Markham and John D. Graham of the same nationality?
Answer: no