According to Danish magazine Her & Nu, Prince Knud and his brother Frederik IX never spoke again after this shock amendment.
Prince Knud’s granddaughter Camilla of Rosenborg, 47, says she is happy the long-running dispute is now out in the open.
“It has been kept a secret, that he tried to stop it. I think it’s really good that people now know that he tried to object to it,” Camilla told the magazine.
“So that people do not just think he just said: ‘OK, that’s how we’ll do it then’. Because that was not the case. He said: ‘No, no, no’!!”
Camilla’s son Ludwig, 19, also commended his late great-grandfather for fighting for his right to rule instead of Queen Margrethe.
“I think he’s damn cool. He stood up for himself. You come to respect him. I’m proud of being his great-grandchild,” he said in the documentary.
If the law had not been amended to allow female heirs to accede to the throne, Prince Frederik would never be king and Princess Mary would not be in line to become the future queen of Denmark.