Katarzyna Telniczanka

Katarzyna Telniczanka (1480–1528), was a Polish noble. She was the royal mistress of king Sigismund I the Old, and the mother of three children by the monarch.

Life Katarzyna, who was reputedly not of noble birth, may have taken her surname from her place of origin - the village of Ternice in Moravia. However, her original family name may have been Ochstat. She became the mistress of the king .

She was the mother of John of the Lithuanian Dukes, future bishop of Poznań (8 January 1499 – 18 February 1538), Regina (1500/1 – 20 May 1526), wed c. 20 October 1518 Hieronim Szafraniec, Starost of Cieszyn (d. 1556/59), and Katarzyna (1503 – before 9 September 1548), wed after 1522 George II Count von Montfort in Pfannberg (d. 1544).

In 1509, she married the nobleman Andrzej Kościelecki. She had one child while married, Beata Łaska z Kościeleckich, who was reputed to be the child of the Sigismund as well.

She followed her son John to his position in Lithuania, where she had great influence in his court.