Official name: Jirnsum (Dutch: Irnsum), Boarnsterhim municipality, Fryslân
province; used to be in the former municipality of Rauwerderhem, along
the railway Leeuwarden - Heerenveen (station Grouw/Irnsum). 1958: 975 inh.;
Village nickname: Kattekneppelers (catclubbers; a cat was put in a
barrel, people threw clubs against the barrel, and after a while it burst,
and when the slightly uneasy cat flew away clubs were thrown at it; any
"lucky" person hitting the cat was the "kattenkoning" (cat-king).
In 1870 this sporting event was forbidden.
Jirnsum: Coat of Arms: in red a silver fess with a blue clover- or Mauritius
cross. This is based on the arms of the former municipality
Rauwerderhem; the cross reminds of the patron saint of the church.
Flag: two vertical stripes of white and red, proportioned 2:1; in the
white stripe a blue clover cross.
Source: Genealogysk Jierboekje 1986.
Encyclopedie van Friesland, 1958.
Groot Schimpnamenboek van Nederland, by Dirk van der Heide, 1998.
Jarig Bakker, 20 Aug 2003