Philippa of England, also known as Philippa of Lancaster, was Queen of Denmark, Norway and Sweden from 1406 to 1430 by marriage to King Eric of the Kalmar Union. She was the daughter of King Henry IV of England by his first spouse Mary de Bohun and the younger sister of King Henry V. Queen Philippa participated significantly in state affairs during the reign of her spouse, and served as regent of Denmark from 1423 to 1425.

Eric of Pomerania, ruled over the Kalmar Union from 1396 until 1439. He was initially co-ruler with his great-aunt Margaret I until her death in 1412. Eric is known as Eric III as King of Norway (1389–1442), Eric VII as King of Denmark (1396–1439) and has been called Eric XIII as King of Sweden. Eric was ultimately deposed from all three kingdoms of the union, but in 1449 he inherited one of the partitions of the Duchy of Pomerania and ruled it as duke until his death in 1459. His epithet of Pomerania was a pejorative intended to insinuate that he did not belong in Scandinavia.