Anna of Poland, Countess of Celje

Anna was the eldest child of that fourth marriage, which also did not produce any sons, to King Casimir's dismay.

Duchess Anna desired to regain Poland for her heirs, the descendants of Casimir III, and to obtain power in her homeland.

When her daughter died in 1416, leaving no further surviving children (except Hedwig), Jogaila married Elisabeth of Pilica in 1417, and then Sophia of Halshany in 1422, both of whom did not descend from the Piast kings of Poland, as he had been unable to find any more brides with a hereditary right to the kingdom.

A party of Polish nobles, including Anna, wanted Hedwig and her intended husband to succeed Jogaila at least in Poland, instead of her half-brothers, his sons by Sophia.

They had a single surviving child: In 1394 the widowed Anna of Poland married Ulrich, Duke of Teck (died 1432).