John Leach (Royal Navy officer)
John Catterall" Jack" Leach,( 1 September 1894 – 10 December 1941) was a British naval officer.
He was the only captain of the battleship during her short period in service.
Andrew Leach
Andrew John Leach( 16 September 1851 – 7 November 1904) was an English footballer in the early days of the sport.
He played for Oxford University in the 1873 FA Cup Final.
Ben Key
Vice Admiral Benjamin John Key,( born 7 November 1965) is a Royal Navy officer.
John Leach (judge)
Sir John Leach, KC( 28 August 1760 – 14 September 1834) was an English judge, and Master of the Rolls.
William Goodenough
Admiral Sir William Edmund Goodenough( 2 June 1867 – 30 January 1945) was a senior Royal Navy officer of World War I.
He was the son of James Graham Goodenough.
Archibald Lucius Douglas
Admiral Sir Archibald Lucius Douglas, (8 February 1842 – 12 March 1913) was a Royal Navy officer of the 19th century.
John Clink
Rear Admiral John Robert Hamilton Clink,( born 18 February 1964) is a former Royal Navy officer who retired from the Royal Navy in 2018.
Adrien Perez
Adrien Perez( born January 12, 1988) is a Swiss swimmer, who specialized in freestyle events.
He represented Switzerland at the 2008 Summer Olympics in Beijing, and competed as part of the men's national swimming team for the men's 4 × 100 m freestyle relay.
Perez joined the team, along with compatriots Flori Lang, Dominik Meichtry, and Karel Novy, and swam in the final leg of the competition, with an individual split time of 49.90 seconds.
He and his swimming team placed seventh in the second heat, and thirteenth overall, for a total time of 3:16.80.
John Evans (Royal Navy officer)
Admiral John Evans( 1717 – 8 July 1794) was a Royal Navy officer.
Karel Novy
Karel Novy( born 12 June 1980 as Karel Nový) is a Swiss freestyle swimmer who won three bronze medals at short- course( 25 m pool) European Championships.
He also competed in five freestyle events at the Summer Olympics of 2000, 2004 and 2008, but never reached the finals.

Question: Are Karel Novy and John Leach (Royal Navy Officer) of the same nationality?
Answer: no