[2] Older Norwegian historiography claims she was the daughter of Günter, Count of Arnstein, and thus Prince Vitslav would have been her maternal grandfather.
The marriage between Euphemia and Håkon had probably been agreed upon at a Danish-Norwegian settlement meeting in the autumn of 1298, at which Prince Vitslav participated as a mediator and guarantee.
The three ballads were titled Herr Ivan lejonriddaren (1303), Hertig Fredrik av Normandie (1301 or 1308) and Flores och Blanzeflor (probably 1312).
[4] King Håkon and Queen Euphemia were buried in St. Mary's Church in Oslo.
Remains of two people, deemed to be Håkon and Euphemia, were discovered during excavations of the ruins of that church and reinterred in the Royal Mausoleum in Akershus Castle.