Parents of Erik Knudsen Sigdal Buskerud

Erik Knudsen can be found in the 1801 Census along with his wife, some of his children and his in-laws. I have having some difficlutly finding out who are his parents and other ancestors. Any help would be appreciated. http://digitalarkivet.arkivverket.no/en-gb/ft/person/pf01058273001960 Maybe him in the Confirmation list, number 6 left page. I would like to know the name of the farm attached to his name. https://media.digitalarkivet.no/en/kb20070312630345 Probably his marriage, fourth from the top https://media.digitalarkivet.no/en/kb20070312630332 Maybe engagement. Last entry https://media.digitalarkivet.no/en/kb20070312630312