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DR-Inland in Denmark

Monday, August 10, 2026 • 5:35 AM UTC - in Denmark

Domestic News ( https://www.dr.dk/nyheder/indland )

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Thomas' donor father turned out to be an SS soldier

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A Danish SS soldier became the donor father of at least 15 children in the 1960s. Now the children want answers as to whether they are the result of an ideological race project.

Thomas Rasmussen is trying to get answers as to how a convinced Nazi could become his donor father. (Photo: © DR, DR) 59 min. ago

Danish Walther Frisch was a convinced Nazi and had sworn allegiance to Adolf Hitler as a Waffen-SS soldier.

After World War II, he received a one-year prison sentence for having joined the Germans. But now DR can reveal that Walther Frisch became the donor father of at least 15 children through fertility treatments at Karolinska Hospital in Sweden in the 1960s.

Thomas Rasmussen is one of the so far 15 people from four different countries who, through DNA testing, have found out that his father was the Nazi Walther Frisch.

- How the hell can a Danish Waffen-SS soldier be my donor father? It just doesn't add up, he says in the new documentary series on DR 'The Mystery of the Danish Nazi Donor'.

Thomas Rasmussen has been in contact with his Swedish half-brother Mats Rydberg. They are both deeply puzzled that a man who was well into his 40s and had been convicted for his Nazi past could end up as a sperm donor in Sweden.

- Heinrich Himmler said that every SS officer should have at least four children. Are we a result of the Nazi ideology, is a question from Mats Rydberg.

Hear how Thomas Rasmussen came into contact with his Swedish half-brothers here:

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Could be many more

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It is impossible to say how many children Walther Frisch fathered. Because it requires a DNA test to get the answer. But so far, DR knows of 15 children from Denmark, Sweden, Finland, and Germany who have the Danish SS soldier as their donor father.

- Only a few percent of the population has taken a DNA test, and we are already 15, so we could easily be well over 100, says Thomas Rasmussen.

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Could you be Walther's child?

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If you have information about the case or may yourself be a descendant of Walther Frisch, journalist Søren Klovborg would very much like to hear from you at [email protected]

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The archives are empty

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It is not only Walther Frisch's age and past that puzzle the donor children. Neither at Karolinska Hospital nor in the Swedish national and regional archives is there any documentation about the sperm donations.

- It can't be right that there is no documentation on this. It looks like a veritable production. It just doesn't add up, says Thomas Rasmussen.

Karolinska Hospital does not wish to grant an interview about the case. But it states that the hospital has no information about Walther Frisch. The hospital calls it "completely unacceptable and deeply unethical" if the choice of donor was ideologically motivated.

Documentary | SEASON 1 The Mystery of the Danish Nazi Donor ( https://www.dr.dk/drtv/saeson/mysteriet-om-den-danske-nazidonor_608270 )

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