In 1537, Illia cancelled the agreement and was offered the hand of Barbara Radziwiłł, younger sister of Anna Elżbieta.
[1] On 3 February 1539 Illia married Beata Kościelecka, rumoured to be an illegitimate daughter of King Sigismund I the Old and Katarzyna Telniczanka.
The ceremony took place at Wawel Castle, one day after the wedding of Isabella Jagiellon and Hungarian King John Zápolya.
He was thrown off his horse and "beaten so badly, that for 6 months was complaining".
According to his testament, Elizaveta was placed under protection of Sigismund II Augustus.