Jansson

Jansson is a Swedish patronymic surname, meaning "son of Jan", derived from Johannes, a cognate of John. There are alternate Belgian, German, Dutch, Danish, Latvian and Norwegian spellings. Jansson is rare as a given name.

Geographical distribution
As of 2014, 86.2% of all known bearers of the surname Jansson were residents of Sweden, 5.1% of Finland, 2.9% of the United States and 1.7% of Norway.

In Sweden, the frequency of the surname was higher than national average (1:199) in the following counties:
 * 1. Uppsala (1:75)
 * 2. Värmland (1:77)
 * 3. Örebro (1:99)
 * 4. Dalarna (1:101)
 * 5. Västmanland (1:109)
 * 6. Gävleborg (1:125)
 * 7. Södermanland (1:141)

In Finland, the frequency of the surname was higher than national average (1:1,893) in the following regions:
 * 1. Åland (1:40)
 * 2. Ostrobothnia (1:545)
 * 3. Central Ostrobothnia (1:1,096)
 * 4. Southwest Finland (1:1,209)
 * 5. Uusimaa (1,782)

Surname

 * AnnMari Jansson (1934–2007), Swedish systems ecologist
 * Augusta Jansson (1859 – 1932), Swedish entrepreneur
 * Bengt Jansson (born 1943), former Swedish international speedway rider
 * Börje Jansson (born 1942), Swedish chess player
 * Camilla Sköld Jansson (born 1957), Swedish politician
 * Daniel Jansson (born 1979), Finnish basketball coach and a former player
 * Erik Jansson (1808–1850), leader of a Swedish pietist sect that emigrated to the United States in 1846
 * Erik Jansson (cyclist) (1907–1993), Swedish, Olympic road racing cyclist
 * Folke Jansson (1897–1965), Swedish, Olympics triple jump
 * Gustaf Jansson (1922–2012), Swedish, Olympic marathoner
 * Helena Jansson (born 1985), Swedish orienteer
 * Herold Jansson (1899–1965), Danish, Olympic gymnast and diver
 * Jan-Magnus Jansson (1922–2003), Finnish politician
 * Jan Janssonius (1588–1664), also known as Jan Jansson, Dutch cartographer
 * Jan Jansson (footballer) (born 1968), Swedish
 * Jesper Jansson (born 1971), Swedish football player
 * Jimmy Jansson (born 1985), Swedish singer and songwriter
 * John Jansson (1892–1943), Swedish, Olympic diver
 * Karl Emanuel Jansson (1846–1874), Finnish artist
 * Lars Jansson (composer), (born 1951), Swedish composer
 * Marlena Jansson (born 1970), Swedish orienteering competitor
 * Mats Jansson (born 1951), Swedish, Chief Executive Officer of SAS Group
 * Mikael Jansson (politician) (born 1965), Swedish politician
 * Nanna Jansson (born 1983), Swedish, Olympic ice hockey medalist
 * Pontus Jansson (born 1991), Swedish footballer
 * Rasmus Jansson (born 1997), Finnish football coach
 * Roger Jansson (born 1943), Finnish politician
 * Rony Jansson (born 2004), Finnish professional footballer
 * Sven B. F. Jansson (1906–1987), Swedish linguist
 * Sven-Åke Jansson (1937–2014), Swedish Army lieutenant general
 * Tommy Jansson (1952–1976), Swedish motorcycle speedway rider
 * Tove Jansson (1914–2001), Finnish novelist, painter, illustrator and comic strip author
 * Ulrik Jansson (born 1968), former Swedish footballer
 * Viktor Jansson (1886–1958), Finnish sculptor

Given name

 * Jansson Stegner (born 1972), American artist

Software
Jansson, a C language cross platform (including Unix, and Windows) package capable of encoding, decoding and manipulating JSON data