She was daughter of King Casimir III of Poland (1309–1370), who was succeeded, not by Anna nor any of Casimir's own descendants, but by Casimir's nephew, King Louis I of Hungary.
The young woman was the child of King Casimir III of Poland (1309–1370), who was replaced in power, rather than by his daughter Anna or any of his direct descendants, but by his cousin, King Louis I of Hungary.