Experienced researchers of Norwegian genealogy will know of the importance of knowing the name and number of the farm where a family came from. This farm name was often adopted as a surname when emigrating out of Norway. Bygdebøker will have the history of farms usually including who lived on, or owned, the farm.
A great resource for locating a farm and finding out a bit about its history is “Norske Gaardnavne” (“Norwegian Farm Names”) by Oluf Rygh. Volumes one through seventeen have been transcribed into a searchable database. Oluf Rygh’s volumes do not include information on people living on the farm-you will need to go to the bygdebok for that. However, if you only have a the farm name and are trying to locate where it is in Norway, or in which municipality it exists, this database is great.