Curiously, the article names "only" one particular group as the lethal victims of this concept in Nazi Germany:
(https://en.wikipedia.org/wiki/Sippenhaft)Examples of Sippenhaft being used as a threat exist within the Wehrmacht from around 1943. Soldiers accused of having "blood impurities" or soldiers conscripted from outside of Germany also began to have their families threatened and punished with Sippenhaft. An example is the case of Panzergrenadier Wenzeslaus Leiss, who was accused of desertion on the Eastern Front in December 1942. After the Düsseldorf Gestapo discovered supposed Polish links in the Leiss family, in February 1943 his wife, two-year-old daughter, two brothers, sister and brother-in-law were arrested and executed at Sachsenhausen concentration camp.
According to the monograph Family Punishment in Nazi Germany: Sippenhaft, Terror and Myth, found on Google Books, Leiss had Polish heritage in part and had relatives living in Poland, he and his family was from Krefeld, he served in the 2nd Panzer Division, whose legal section didn't actually provide proof that he was a deserter, and that the execution of the entire family was actually reported and lauded by the local press.
https://books.google.com/books?id=mSFeA ... 22&f=false
In my view, the small amount of information available about this case raises some questions for sure. I can imagine that there were tens, maybe hundreds, of thousands of Wehrmacht troops with partially Slavic ancestry, and many of them undoubtedly deserted. Yet I see no evidence that it was routine practice on the part of the Gestapo to round up and execute their entire families. Was this particular case just an isolated one, for whatever reasons?