Swedish regent. She was a Norwegian princess and a Swedish princess and duchess and is considered the first woman ever to rule Sweden, albeit only for a year, as regent for her infant son. In Swedish her name was Ingeborg. When her husband Prince Eric of Sweden, Duke of Sudermania, was murdered by his brother King Birger in 1318 and Birger fled the country, his son was bypassed and her little boy Prince Magnus was next in line. It was expedient in the turbulent times for Swedish magnates to take advantage of the young duchess and have her sign letters giving privileges and donating estates to them. Little Magnus had already been elected King of Norway where she was part of a regency government in 1319–1327. With Magnus elected King of Sweden as well, she joined a regency for him also there. Though not titled thus, she then was in the position of a queen mother for decades. She was the only marital daughter of King Hacon V and Queen Euphemia of Norway and had been engaged already as a child originally to another Prince Magnus of Sweden, the son of King Birger who was bypassed in 1318 and beheaded in 1320. She married Eric in 1312 in Oslo. For the occasion, her mother Queen Euphemia published her famous Euphemia Songs. While her son eventually was King Magnus IV of Sweden and King Magnus VII of Norway she retained a position of national influence until she was remarried to a Danish nobleman in 1326. Her influence was then limited to his Duchy of Hallandia, and after his death and the early death of their two sons, she ruled there on her own. She also staged major festivities for the king's coronation, welcoming her daughter Euphemia, then married to a Duke of Mecklenburg, to attend in 1336. The location of her grave is not known. This is to document the contemporary bust of her in Linköping Cathedral.