Olaf b. 9/13/1847 in Seljord to Anne Stenerdr Bugt

Hi All, I am an Australian descendant of Anne Stennersdatter. Olaf is the half brother of my great grandfather Anders Gundersen who is also a son of Anne Stenersdatter. Any help locating further information about Olaf and his family would be greatly appreciated. Kind regards, David Gunderson (Brisbane, Australia)