Editing Gjerdrum (section)

==Name and coat of arms==
The municipality (originally the [[parish]]) is named after the old Gjerdrum farm ([[Norse language|Norse]] ''Gerðarvin''). The first element is the [[genitive]] of a river name ''Gerð'' and the last element is ''vin'' '[[meadow]], [[pasture]]'. The river name is derived from the Norse word ''garðr'' meaning '[[fence]]' and so the meaning is 'the river whose function is a fence (or as a border)'.

The [[coat of arms]] is from modern times. They were granted in 1993. The arms show a traditional Norwegian form of [[roundpole fence]]. The arms are also [[canting arms|canting]] because the name of the municipality refers to a fence.<ref>{{cite web|url=http://www.gjerdrum.kommune.no/Modules/theme.aspx?ObjectType=Article&ElementID=5079&Category.ID=10737 |title=Om kommunevåpenet i Gjerdrum |publisher=Gjerdrum kommune |access-date=2008-12-18 |language=no |url-status=dead |archive-url=https://web.archive.org/web/20110724182051/http://www.gjerdrum.kommune.no/Modules/theme.aspx?ObjectType=Article&ElementID=5079&Category.ID=10737 |archive-date=2011-07-24 }}</ref>