Fritz Carl Anton Englund entered the Stockholm chess circles as a young man, and soon became a friend and publisher of the books by Ludvig Collijn. He was also an editor of Tidskrift för Schack and its problem column. After 30 years of promoting chess, in 1927 he became the 4th honorary member of the Swedish Chess Federation.
He played in most of the main Scandinavian events: Stockholm 1897 (11th), Copenhagen 1899 (9th), Gothenburg 1901 (4th), Hannover 1902 (22nd), Oslo 1903 (5th), Stockholm 1905 (5th), Barmen "Main" A 1905 (8th=), Stockholm 1906 (8th=), Copenhagen B 1907 (1st=), Stockholm 1912 (7th=), Scheveningen 1913 (9th=), Stockholm 1913 (8th=), Stockholm 1916 (5th=) and Stockholm 1917 (5th=). His peak as a player was around year 1906.
Fritz Englund was a noted problemist and the Englund Gambit was named after him inadvertently. The opening was kind of invented by the Latvian Karl Behting (1867-1943, best known for the Latvian Gambit), who published his analysis Königsbauer gegen Damenbauer in Deutsche Schachzeitung 1930. Two years later Englund sponsored a thematic tournament held at Stockholm in late 1932 and 1933. Every game had to begin with Behtings main line (1.d4 e5 2.dxe5 Nc6 3.Nf3 Qe7 4.Qd5). Perhaps because Behtings article had already been forgotten, or because Englund died shortly afterwards, when chess magazines reported his death they rarely failed to mention "Englunds Gambit Tournament" (which was won by Gosta Stoltz). So the name stuck.
Naturally the gambit had been played also before, e. g. by the Australian Henry Charlick (1845-1916) as 1.d4 e5 2.dxe5 d6. But Englund got the glory!
Main sources: Wikipedia article: Englund Gambit and http://www.chesscafe.com/text/kaiss.... Historical rating: http://www.edochess.ca/players/p577... or http://www.chessmetrics.com/cm/CM2/...