Ellef Olsen

I am looking for information on my great great grandfather, Ellef Olsen born October 13, 1778, in Boe, Telemark, I cannot find him in the church records. In the 1801 census there are a couple of Ellef Olsen's, but I am not sure which one was he. He married Asberg Halvorsdtr bon on December 08, 1791 in Sonseboe Farm, Boe, Telemark. I am looking for the church records and census records for her also.