general information family Syrtveit

Looking for any information about: Gunnuf Halvorsen Syrtveit and his wife Ragnil Clemetsdatter their son Halvor Gunnulfsen Born June 9, 1826 (my g grandfather) in Evje. Austre Moland farm Urdalen under Floystad Knud Andersen Syrtveit and wife Siri Guttormsdatter their daughter was Siri Knudsdatter born July 1, 1835 (my g grandmother) I believe they all lived in Evje for many years and many families later. They left for America in 1880 or 1881. A son Gunnulf (born July 15, 1855) stayed in Norway in Evje. I would like to find as many ancestors as possible. The older writing is very hard for me to read. Thank you for any and all information.