When you go to the site, click on the "Vollenweider ancestors" folder. In it you will find scanned copies of family register pages from the Aarburg Rathaus (city hall) in canton Aargau, Switzerland. One of these is started whenever a male child gets married. This is noted on his father's registry page, where is shows when a son has started his own registry and the page number. The fathers page also notes who his wife is and the what registry she came from, as well as his daughters and the registries that they get transferred to when they get married. Also on the registry are dates for all of births, marriages and deaths.
Here is some translation if you don't speak German:
Geboren = birthdate Vide pag = birth registry page number of the man or woman’s father (where he/she is listed as a child). For their children, it shows the page number of their registry that they started when they got married. Ehefrau = wife Kinder = children Data = this shows marriage dates, and death dates
Some of the small text is hard to read because of the script. Even native Swiss can't always read this.
Also included is Johann Gotfried's birth certificate from Aarburg, and the article from the local paper recording his death in Hitchcock, SD, USA, which was recorded in Aarburg. His name was spelled John Godfrey in the article.
The family tree goes like this:
Johann Gottfried V. born 3 Nov 1842, (the birth cert date is 16 Nov becaue it was not registered for a couple weeks).
Jacob V. born 13 Feb 1792. He had a coulpe wives that died in childbirth. (You can see the dates the the mother died and that a baby had also just been born in the Kinder section). Johann Gottfried (name abrieviated in the middle of Jacob's registry page 2) shows his mother was the 4th wife of Jacob (but only #2-4 are listed in the registry) and her name was Rosina Meyer. They were married 27 Apr 1861.
Georg V. born 1760 (no birthdate) who was married on 7 Nov 1782 (top right corner) to Barbara (can't read/or no last name). He died on 4 Feb 1813, and she died on 28 Mar 1823.
-Rosina Meyer's tree:
Johannes M. born 3 Apr 1773, married Anna Barbara (no last name) on 15 Sep 1796. She was the mother of Rosina. She died on 9 Jul 1813 and Johannes remarried to Anna Maria 28 Oct 1814. Johannes died 8 Aug 1838.
Abraham M. no birth date, married to Ana Maria who died on 27 Mar 1816. Johannes was the fourth child.
Before Georg V. and Abraham M., the local churches maintained the records of births, marriages, and deaths. These records are now all in the Aargau Canton Archives in the capital of Aarau. I have not had a chance to visit there to do research.
I hope this is helpful. I am descended from J.G.and Eliza Jane (Kaump) V's son William A.V., born 13 Apr 1872. William's son with Adelia Blanche Pownell's son George Arthur born 25 Jan 1914. His son with Alice Glazier was my dad, Larry Keith V, born in Huron, SD, 1939. My wife is also a Swiss citizen and grew up in Canton Aargau too!