I think that you are probably looking for the villages of Patersberg and Sagewerk(umlaut over the a). Both are located near each other in the current Rheinland-Pfalz area which in the early 1800's included Nassau. They are located between or near the towns of St. Goar and St. Goarshausen on the north side of the Rhein river.
The ships list of the Gerhard Hermann which left Bremen on 13 November 1845 and arrived in Galveston, Texas on 10 January 1846 lists Christian Holzhauser from Patersberg, his wife Anna nee Liss, and children Heinrich, Peter, Johann, Friedrich and Philipp.
Hope this helps.