Sigismund I the Old King of Poland and Grand Duke of Lithuania (1467–1548) Parents Elisabeth of Habsburg Casimir IV Jagiellon Children Wojciech Olbracht Isabella Jagiellon Sophia Jagiellon, Duchess of Brunswick-Lüneburg Hedwig Jagiellon, Electress of Brandenburg Catherine Jagellon Katharina of Poland, Countess of Montfort Regina Szafraniec Sigismund II Augustus Anna Jagiellon John Jagiellon Anna Jagiellon Siblings Barbara Jagiellon Alexander Jagiellon Saint Casimir Vladislaus II of Bohemia and Hungary Elizabeth Jagellon Elisabeth Jagiellon Anna Jagiellon Sophia Jagiellon, Margravine of Brandenburg-Ansbach Elizabeth Jagiellon Hedwig Jagiellon, Duchess of Bavaria John I Albert Frederick Jagiellon Partners Katarzyna Telniczanka Barbara Zápolya Bona Sforza
