My Family History and Research

My name, at birth, was Robert Bryan GUTTMANN. My parents are both Ashkenazi Jews who were born in Germany before or during the rise of the Nazi regime. They were both still in Germany on Kristallnacht, in November of 1938. They each escaped from Nazi Germany, eventually getting to South America. Our families were fragmented and destroyed by the Holocaust. Many family members were murdered, disappeared. The few survivors were scattered across the world. In many cases we were (and still are) unaware of other relatives who still exist. Our parents finally met, and married, in 1962, in New York City.


I research our family history using traditional methods of records searching and analysis. My research is guided by the Genealogical Proof Standard (GPS) as a guideline. Read “Understanding the Genealogical Proof Standard” by Tyler S. Stahle for more about it. That said, the fourth step, “resolution of conflicting evidence,” can be difficult. Dates, “accurate” spelling of names, a description of events “as they really happened” — we can only objectively know what was recorded and preserved. Human memory is unreliable and subject to revision, yet many records that guide us are through an oral tradition. Many times the records are “wrong” … yet that is all we have left.

I also have done a little bit of genetic genealogy research — using DNA testing to find potential relatives, and identify unique genetic markers for families of interest.

Families that I Research

There is a list of family names that are my primary research interest

Here is a list of family names that are my primary research interest. Those are family names in my ancestry in which I have hit a brick wall.

Published Family Trees

The most current and correct version of my research is stored locally on my computers in a genealogical database. This is also where my research notes, raw data, etc. are stored, with backups. The public versions (non-living individuals) are accessible on Ancestry and Geni.

Ancestry.COM Family Tree

Ancestry.COM is currently the place where I synchronize my database to the Internet. The site is named “Guttmann Rosenburg Koppel Sigman Families” and the URL is

Access to non-living individuals is available to anybody who has a records research account on Ancestry.COM just by clicking on the link. If you do not have an Ancestry account, or if the link does not take you to my family tree, contact me and I will send you an invitation to view the tree for free. Include the email address and account userID that you have at Ancestry.

Living individuals are not shown by default. I will only provide access to living individuals if there is strong evidence that you are a family member, or at my discretion otherwise. If you are not a family member, please review my sharing policy. Non-family researchers will be granted access to living persons on a temporary basis, evaluated on a case-by-case basis.

To avoid confusion here … “confirmed as a family member” does not mean that one of the DNA matching services says that we are second or third cousins. I am afraid that puts you into a group of over 100,000 “relatives” and we will have to do better than that. My sharing policy intends to protect you and your family as much as my own.

Browsing and Matching a GEDCOM

I don’t provide a downloadable GEDCOM file online. Contact me if you have your family tree in a sharable (sanitized) GEDCOM format and would like to compare it to mine. My tree is a bit too large to eyeball, so it will be necessary to use some automated tools to find matching individuals. I can run this on my computer. There are also some online tools that might be useful for doing some matching. I would get your explicit permission before doing anything with your GEDCOM outside the security of my computers.

Geni : A Global Family Tree

My profile on Geni is Robert Bryan Jenson né Guttmann. In the family research pages linked here, you will see hyperlinks from individual names to their Geni profile.

Geni is a global family tree site. Geni connects family trees together into one interlinked tree. Individual genealogists collaborate to merge individuals and reconcile conflicting information. Geni has a very broad reach and is curated by a cadre of volunteer genealogists.

To access data on Geni, you will need to create a free account and log in to browse the tree. You can skip entering all the information about your family until you are ready to connect yourself to the tree. Once you have logged in, you can able to browse the tree, and click on links to individual profiles.

If you are a family member, please contact me after you have created a Geni profile so that we can link your profile into the world family tree, and invite you to the family group.

Please take care when using Geni as a data source. There are many connections that are unproven or even “wishful thinking” in some cases. If sources are not listed … beware. If sources are listed and those sources are other genealogies scraped off the Internet … beware.

My DNA Kits

I deleted all my public kits from GEDMatch in 2019. None of the kit numbers listed below should provide data on GEDMatch. If you downloaded and saved GEDMatch data before November 18, 2019, some of these kits might match your data:

Kit IDWhose Kit?
M770426my mother
PM367889M1my phased DNA (maternal)
PM367889P1my phased DNA (paternal)

The following kits were on GEDMatch Genesis.

Kit IDWhose kit?
SQ7350329my sister
KV9457288my mother
UT3757008M1my phased DNA (phased maternal)
UT3757008P1my phased DNA (phased paternal)
SQ7350329M1my sister (phased maternal)
SQ7350329P1my sister (phased paternal)

My brother’s DNA is not sequencable, unfortunately.


  • Move published family tree information to a separate page.
  • Move DNA kit information to a separate page
  • Trim the text

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