Overview
Count Ingolf of Rosenborg (born 17 February 1940) is a Danish count and former prince. Born Prince Ingolf of Denmark, he appeared likely to some day become king until the constitution was changed in 1953 to allow females to inherit the crown, placing his branch of the dynasty behind that of his cousin Princess Margrethe and her two younger sisters. He later gave up his princely rank and his rights to the throne in order to marry a commoner.
Family
Ingolf was born at Sorgenfri Palace, Sorgenfri, as His Highness Prince Ingolf of Denmark. He was the elder son of Hereditary Prince Knud, by his wife and first cousin, Hereditary Princess Caroline-Mathilde.
Loss of place in succession
From the death of his grandfather in 1947, Ingolf stood only behind his father in the order of hereditary succession to the throne and was expected to become king in his turn. His father Prince Knud was then the heir presumptive, due to succeed Ingolf's uncle King Frederick IX, who had three daughters but no sons.
In 1953, the Constitution of Denmark was amended to allow cognatic primogeniture. The new law made thirteen-year-old Princess Margrethe the new heir presumptive, placing her and her two sisters before Prince Knud and his family in the succession. Ingolf was thus relegated to fifth in the line of succession to the Danish throne, but more importantly, he now ranked behind Margrethe and others who were likely to have dynastic children of their own (as has, in fact, happened). The princess became Queen Margrethe II in 1972 and is still reigning as of 2023. Ingolf's place in the line of succession, were he still eligible, would be no higher than twelfth today.
From Wikipedia (CC BY-SA 4.0).