Helgesen/Halvorsen Aadalen&Nordrehoug

I would like to know how to find baptism records for Helgesen and/or Halvorsen. 1865 Census gave me the following: Helge Halvorsen Logerende g Arbeider 1837 Nordrehoug Bjælkehugger Caroline Ellingsdatter hans Kone g 1840 Drammen Martte Helgesdatter deres Datter ug 1862 Aadalen Hans Helgesen deres Søn ug 1865 Aadalen I also have the name if Helge's parents and siblings. Halvor Helgesen Husfader g 1803 Aadalen Husmand med Jord Kjerstine Klemmessdatter hans Kone g 1812 Aadalen Lise Halvorsdatter deres Datter ug 1845 Aadalen Christian Halvorsen deres Søn ug 1842 Aadalen Lars Halvorsen deres Søn ug 1850 Aadalen Martin Halvorsen deres Søn ug 1854 Aadalen