In my last Blog, I wrote about finding a significant DNA match on my mother’s paternal side. This is my rarest grandparent as far as DNA matches. My mom’s dad was a German Rathfelder from Latvia who emigrated to the US in the early 1900’s. As a result, this side of the family appears to have few US relatives. When I left off, I was having trouble finding a common ancestor between the match and my mother due in part to there being more than one Wilhelmine Rathfelder in the mid-1800’s Hirschenhof, Latvia.
The Two Wilhelmine Rathfelders
To recap, my mother’s DNA match had as their ancestor Friedrich Bernhard Spengel. Fried’s birth record in 1859 listed his mother as Wilhelmine Rathfelder. When I looked up the birth record of Wilhelmine Rathfelder, I found that she was born in 1844. This would make her only 15 at the birth of her son. That same record stated that her godmother’s name was also Wilhelmine Rathfelder who was an unmarried woman at the time. For this reason and others, I decided that the 15 year old Wilhelmine Rathfelder was a poor choice to be Friedrich Spengel’s mother.
Since my last blog, I found an 1855 Spengel/Rathfelder marriage that had potential:
The next to the last entry appears to be a Joh. Peter(?) Spengel and Aldene Wilhelmine Rathfelder. One problem here is that Friedrich’s father was Johann George Ludwig Spengel and this groom appears to be Johann Peter Spengel.
I then found this birth record from 1838:
Here is cousin Inge’s rendering:
born on Januar (January) 17. abends (in the evening)
baptized the 19th of January
No. 2 Adeline Wilhelmine Rathfelder
V (father) CW (which means Colonie Wirt = farmer) George Rathfelder;
M (mother) Cathar(ina) Elisabeth geb. Hofmann
Taufzeugen (godparents): Gottlieb Raschefsky und Frau (wife) Anna Charlotta geborene Erhard,
Adeline Wilhelmine geborene Schulz.
Note again the custom of naming the child for the godmother – in this case Adeline Wilhelmine Schulz.
Two Johann Georg Rathfelders
It appears that not only were there 2 Wilhelmine Rathfelders, but also two brothers with the same name of Johann Georg Rathfelder. Just to make it confusing they were both the sons of my ancestor Johann Georg Rathfelder aka Hans Jerg Rathfelder. Here is the genealogical reference with Inge’s note: “Hans Jerg”.
This means that Adeline Wilhelmine Rathfelder was the daughter of Johann Georg (but he apparently went by Georg) born 1792. Her uncle was Johann George (my ancestor) b. 1778 and her grandfather was also Johann Georg (aka Hans Jerg). That puts the common ancestor of my mom and her Spengel descendant DNA match back to Johann George (aka Hans Jerg) Rathfelder b. 1752 and his wife Juliane Bietenbinder. Hans is my mom’s 3rd great grandfather in the upper right box below.
This means that AncestryDNA was somehow right in assigning my mom’s Spengel/Rathfelder descendant 4th cousin status.
The Spengel/Rathfelder Story
I find that if I am able to put genealogy into a narrative and it makes sense, then there is a likelihood that the story may be true.
Hans Jerg Rathfelder and Juliane Bietenbinder had several children in the German Colony of Hirschenhof in Latvia. Two of their sons had the same name: Johann Georg Rathfelder. The older son went by Johann and the younger went by Georg. The elder son Johann was my ancestor. The younger, Georg, married Catherina Hofmann in 1813. 25 years later in 1838 they had a daughter named Adeline Wilhelmine Rathfelder. In 1838 Wilhelmine’s mother would have been about 42. This daughter may have been a 6 year old godmother at the birth of another Wilhelmine Rathfelder in 1844. In 1855, as a young 17 old girl, Adeline Wilhelmine Rathfelder married Johann Peter Spengel. At about age 21 in 1859 the elder Wilhelmine had a son named Friedrich Bernhard Spengel. However, at this time, Friedrich’s father is called Johann Georg Ludwig Spengel.
So that’s my story and I’m sticking to it. I’m betting that Johann [somebody] Spengel married a Wilhelmine Rathfelder in 1855 and that they were the same couple that had a Friedrich Bernhard Spengel in 1859. I do note that the Spengels were also related to the Gangnus family in Hirschenhof. Gangnus is the name of my Rathfelder grandfather’s mother. So that may explain my mom’s larger than average match with her 4th cousin.
Let’s Map Mom
Now that I have a reasonable common ancestor for my mom and her new Spengel/Rathfelder match, I can update my mom’s Chromosome Map using the Kitty Munson tool:
This fills out her paternal side a little more and also gets her first 1700’s chromosome mapping. All the others were “only” in the middle third of the 1800’s! Hans Jerg Rathfelder and his wife Juliane Bietenbinder are now shown in light blue.
My Chromosome Map
It turns out that even though my mom had a large DNA match as well as my 2 sisters, my gedmatch one to one match wasn’t that large. This is one of those rare cases where Ancestry gives me a larger match than Gedmatch. Here is how my match with the same Spengel/Rathfelder descendant show up at AncestryDNA:
Here is my one to many match at gedmatch:
Gedmatch warns me to do a one to one match which brings my total cM match down from 25.1 to 18.9.
I just found out that the gedmatch SNP threshold went from 700 to 500, so a few days ago, my match would have been only 8.3 cM total. I may have other matches also as my sisters and mother match this same person in areas where I am below this threshold.
Here is my updated Chromosome Map:
It seems like my maternal and paternal mapping is evening out. I didn’t think that this would ever happen.
Comparing my mom’s map and mine, I got most of Hans’ and Juliane’s DNA from my mom on my Chromosome 6 and 9, but I didn’t get any of the large amounts of DNA from my mom’s Chromosomes 17 and 18.
While I’m at it, I’ll see what else I can do.
Here is how the Spengel descendant matches with my mother, me and one sister on Chromosome 1:
This is probably one of those segment matches that AncestryDNA had but was below the gedmatch threshold. The first match is my sister Sharon, then my mom, then me. Here is how I had it mapped out (with Kathy Johnston’s help):
The area of interest is from 62 to 68. Kathy has it correctly mapped out that Sharon and I have Rathfelder in there in blue and my other sister Heidi has the other maternal grandparent (Lentz) from 62 to 68.
Chromosome 6 Revised
Here is how the Spengel/Rathfelder descendant matches my mom and all three of her DNA tested children on Chromosome 6:
Note all the matches are between 155 and about 161. Here is my Chromosome 6 map:
When I was working on this map, I had noted an inconsistency in my paternal side on the right hand side and hadn’t yet resolved that problem. This proves I was wrong on my maternal side also after 155. Instead of 3 blue maternal Lentz segments after 155, there should be three orange ones as proven by the Spengel/Rathfelder match. I’ll just do a quick fix. There appears to be a double crossover for my 2 sisters where I previously had one for me at 155. I’ll add Sharon and Heidi’s crossover at position 155 and take out mine:
Perhaps this is not a perfect Chromosome 6 map, but it is much better than it was.
Chromosomes 17, 18 and 19
I covered Chromosome 17 in my previous blog.
Spengel/Rathfelder only matches my mom on Chromosome 18:
Perhaps that DNA went to one of my other three siblings that haven’t tested for DNA yet.
Lastly, here is how mom, sister Heidi and I match Spengel/Rathfelder on Chromosome 19:
The matches are from 56 to 59, so the scale in the image isn’t perfect. Let’s see how my mapping looks.
It looks like I had some trouble on my family’s Chromosome 19. I couldn’t figure out a section and couldn’t map my maternal side to a specific grandparent. Well, now, thanks to our Spengel/Rathfelder descendant match, things will be clearer. Heidi and Joel match a Rathfelder and Sharon doesn’t from location 56 to 59. That means that I can map the orange to my Rathfelder grandfather’s DNA. That leaves my maternal grandmother Lentz who will be in the green areas.
So here we have identified Maternal grandparents 1 and 2. This information should be useful. For example, if my sister Sharon in the top bar has a Chromosome 19 DNA match on the maternal side, I will know not to look for any Hirschenhof ancestors.
Summary and Conclusions
I believe that this is how it is supposed to work. The DNA helps target the genealogy and the genealogy identifies the DNA. One side leverages the other and back and forth we go between DNA and genealogy. Hence the term genetic genealogy.