Caladogram analysis by Coleen Fitzpatrick, PhD

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Your study is made up of mostly unrelated people.  There are a couple of pairs of people who are related, and a group of four members (labeled MDR1) who match exactly, but the biggest group is in the upper left of the diagram.  They form a star pattern which indicates an older family.  This is the core group of Raders.  I don't know if I would include GER and WER in this group, but for now just include them because they are so much closer to the main group than to everyone else.

It's been my experience too that as you get more people into your study, there might be Raders who come along and genetically "sit" between GER and WER and the main group, tying them into it.  So that GER and WER might not be directly related to the core group, but they will be related to it through those intermediates that come along.

It would be interesting to study the origins of the people in this group and try to get some more people from that family to take the test so you can fill out the star more.
 

It seems to me that the name Rader had very diverse origins, from several countries.  I gather just from looking at the cladogram that Rader was either an occupational or a geographical surname, like Baker and Forest, respectively

http://www.forensicgenealogy.info/