John Jackson (football manager)
John Jackson was the first manager and a founder of Brighton& Hove Albion F.C.
John Parker (author)
John Parker is a British author and journalist.
John Jackson (footballer, born 1923)
John Jackson (7 January 1923 – 1992) was an English footballer who played in the Football League for Stoke City.
John M. Parker
John Milliken Parker, Sr.( March 16, 1863 – May 20, 1939), was an American Democratic politician from Louisiana, who served as the state's 37th Governor from 1920 to 1924.
He was a friend and admirer of U.S. President Theodore Roosevelt.
John Jackson (travel writer)
John Jackson( died 1807) was a British traveller and writer.
John Parker (Oswego County, NY)
John Parker( born December 27, 1810) was an American farmer and politician from New York.
John Jackson Smale
Sir John Jackson Smale( 1 March 1805 – 13 August 1882) was a British lawyer and judge.
He served as Attorney General and the longest- serving Chief Justice of Hong Kong.
John Jackson (writer)
John Jackson is an English screenwriter.
John Parker (potter)
John Parker( born 1947) is a New Zealand ceramicist and theatre designer.
John Jackson (astronomer)
John Jackson (11 February 1887 – 9 December 1958) was a Scottish astronomer.

Question: Did John M. Parker and John Jackson Smale share the same nationality?
Answer: no