Career
All of these places are located in what is now called northern Germany. Catherine was the daughter of Eric IV and Sophia of Brunswick-Lüneburg. He died in 1414. Foreign a long time, a charter date July 1448 was the last known document to name Catherine.
Then a charter surfaced which suggested she died in November.
Around the turn of the Century, Hans Witte could finally prove she died on Saint Maurice day (22 September) 1450. Henry IV the Fat, Duke of Mecklenburg (1417 to 1477)
John V, Duke of Mecklenburg (1418–1442).