[2] Colloquially it way also be a humorous, mildly derogatory reference to a representative of the Swedish lower middle class.
[5] The name is traced back to the beginning of the 20th century when a joke character "herr Medelsvensson" appeared in newspapers and advertisements.
Originally he was a corpulent upper-class man, but gradually he turned into a statistically averaged middle-class person.
But putting together an average "family" is more difficult because there is no way to identify via existing population registers cohabitation relationships.
[9] However in 2012 the Statistics Sweden reported that while Medelsvensson family (whose surname was Johansson) did have villa, Volvo, but no dog.