Ingrid Victoria Sofia Louise Margareta, queen of Sweden married then Crown Prince of Denmark, Frederik IX of Denmark. The two married in Stockholm on 24 May 1935. It was common even to this day that royalty intermarries. Ingrid was related to Frederik in several ways. In descent from Oscar I of Sweden, they were third cousins. In descent from Leopold I, Grand Duke of Baden, they were third cousins. In descent from Paul I of Russia, Frederick was a fourth cousin of Ingrid's mother. She became the Queen of Denmark upon her husband's accession to the throne on 20 April 1947. The couple had three children. After (Read More.....)