Hans Hansen Ramstad from Drøbak

Can anyone help me determine the birth/baptism of Hans Hansen Ramstad from Drøbak? I have hit a brick wall. I have pieced together some ideas from my own research and clues contributed by others tracing the Sundbye family who just happened to marry into my Hans Hansen Ramstad family. Clues : Hans Hansen Ramstad was married Dec 27 1801, see #2 note that Sergiant Sundbye was one of the witnesses. According to the 1801 census Hans Hansen was then 21 years old. Olaug Andersdatter was 22 years old in 1801 and her baptismal record is most likely #5 she was a twin, was baptized Febr 14 1779 and her parents were Anders Nielsen and Abelone Larsdatter. (contributor, Eibache). 1807 census for Hans Hansen Ramstad in Fredrikstad --Vegh. Tamb. Hans Ramstad from Drobak, 28 years old, lived there 10 1/3 years, Skogaer med Kone Olove Anders Dtr. thune S. 30, lived there 8 years pige Gunild Marie born in Fredrikstad 1/2 year old. Other children: Petroe Annes (Sundbye) father Hans Hansen in 1801 is here (contributor, Eibache) Anne Helene Hansdatter, b. bet. 1802 and Jan. 16 1803 in Fredrikstad Anders Hansen b. abt. 1804 in Fredrikstad Gunild Marie b. 1806 in Fredrikstad Inger Marie b. 22 June 1810 in Fredrikstad Hans Jorgen Hansen b. 30 Oct. 1815 in Fredrikstad Anne Grethe Hansdatter Ramstad b. 31 Dec. 1818 in Fredrikstad Problem: I thought Drøbak was in Akershus and I have tried looking up a baptismal record for Hans Hansen Ramstad born about 1779 in the Norwegian digitized parish registers available at the Digitalarkivet web site - http://digitalarkivet.uib.no/cgi-win/WebFront.exe?slag=vis&tekst=meldingar but have had not luck. What parishes might I try to find a baptismal record? Is there a Ramstad farm in/near Drøbak in Akershus? Would that have been the farm name Hans Hansen used in the 1801 census when he was in Fredrikstad? Any hints on getting further back with Hans Hansen Ramstad's ancestors? Thank you!