Sigrid and Bertha Olsdatter Kellerud

We have been searching for information on #13, EMILIE, 1840, namely Anthon Johannesen. His mother was Bertha Olsdatter Kellerud. (#10). Bertha was the sister of Sigrid (#4), the wife of Even Hansen (Heg) (#3). We have drawn a blank in searching the Lier area. A light recently went on. Those two ladies were born in Flesberg. Sigrid on 21 October 1797. Bertha, about 1802. It seems quite likely that the Johannes Evensen family came from Flesberg - some miles west of Lier, as I recall. What is Known: The parents of the two ladies were Ole Gullixsen Kallerud and Anne Olsdatter Ramnaas. Can we find any records in Flesberg about these people? Is there any clue there as to why the Johannesen family took the name Skofstad after migrating? BTW - Emilie manifest gives Sigrid's age as 40. Her birthdate would indicate she was 43. Also, did I send you a correction for Andrea (#7)? She was a girl.