Karl Decker
Karl Decker( 30 November 1897 – 21 April 1945) was a general in the Wehrmacht of Nazi Germany during World War II who committed suicide in the Ruhr Pocket on 21 April 1945.
He was a recipient of the Knight's Cross of the Iron Cross with Oak Leaves and Swords.
Nils Einar Vinjor
Nils Einar Vinjor( born 15 December 1962 in Øvre Årdal, Norway) is a Norwegian guitarist known for his solo albums and the collaboration with musicians like Silje Nergaard, Iver Kleive and Knut Reiersrud.
Karl Decker (footballer)
Karl Decker (September 5, 1921 - September 27, 2005) was an Austrian footballer and manager.
He is usually regarded as one of Austria's greatest players and one of the most prolific players of his generation.
Biswajit Bhattacharya
Biswajit Bhattacharya is a former footballer and manager.
Josef Naus
Josef Naus( 1793 – 1871) was an officer and surveying technician, known for leading the first ascent of Germany's highest mountain, the Zugspitze.
Variations of his name are Karl Naus or Joseph Naus.
Lars Mjøen
Lars Lennart Heiberg Mjøen( born 13 November 1945) is a Norwegian comedian, actor, singer, screenwriter, director, editor and author.
He is best known as a member of the comedy trio KLM, alongside Trond Kirkvaag and Knut Lystad.
Knut Gadd
Knut Gustaf Gadd( December 4, 1916 – May 8, 1995) was a Swedish water polo player who competed in the 1948 Summer Olympics.
In 1948 he was part of the Swedish team which finished fifth in the water polo tournament.
He played one match.
Predrag Jokanović
Predrag Jokanović( Serbian Cyrillic: Пpeдpaг Јокановић; born 26 October 1968) is a Serbian retired professional footballer, and is a manager.
In his playing days, spent almost exclusively in Portugal – exactly ten years, nine of those in the Primeira Liga, where he amassed totals of 191 matches and 18 goals – he played mainly as a defensive midfielder( although he could occasionally appear as a central defender).
After retiring in 2003, Jokanović took on a managerial career in the same country.
John Hunter (Australian footballer)
John Hunter is a Scottish- born Australian former footballer and coach.
Jorgen Nielsen (football manager)
Jorgen Nielsen is a Danish former footballer and coach.

Question: Are Karl Decker (Footballer) and Knut Gadd from the same country?
Answer: no