Eric of Pomerania

Erik became co-ruler of the Kalmar Union in 1396 alongside his great-aunt Margaret I, taking the crowns of Denmark and Sweden that year and adding Norway's in 1389. After Margaret's death in 1412 he ruled alone, but the union frayed. Sweden deposed him in 1434, briefly reinstated him in 1436, then removed him again in 1439. Denmark followed suit in 1439, Norway in 1442. A decade later he inherited a partition of the Duchy of Pomerania in 1449 and ruled there until his death in 1459. The epithet "of Pomerania" was meant as a slur — a suggestion that he never belonged in Scandinavia at all.