Beata Łaska z Kościeleckich

Beata Łaska z Kościeleckich (1515-1576), was a Polish magnate heiress. She was reputed to be the illegitimate daughter of king Sigismund I the Old. She was the daughter of Andrzej Kościelecki and Katarzyna Telniczanka and married to Illia Ostrogski (d. 1539) in 1539, and Olbracht Łaski in 1564. She served as maid-of-honour to queen Bona Sforza prior to her marriage. She was the mother of Elizaveta Ostrogska.

Beata Łaska z Kościeleckich

Beata Łaska z Kościeleckich (1515-1576), was a Polish magnate heiress. She was reputed to be the illegitimate daughter of king Sigismund I the Old. She was the daughter of Andrzej Kościelecki and Katarzyna Telniczanka and married to Illia Ostrogski (d. 1539) in 1539, and Olbracht Łaski in 1564. She served as maid-of-honour to queen Bona Sforza prior to her marriage. She was the mother of Elizaveta Ostrogska.