Background
Magnus was the third son of Duke Albert II of Mecklenburg and his wife Euphemia of Sweden, the sister of the King Magnus IV of Sweden.
Magnus was the third son of Duke Albert II of Mecklenburg and his wife Euphemia of Sweden, the sister of the King Magnus IV of Sweden.
Magnus had two children:
John IV, Regent of Mecklenburg from 1384 to 1395 and co-regent from 1395 to 1422
Euphemia (d 16 October 1417);
married on 18 October 1397 with Lord Balthasar of Werle.