Sigismund was his baptismal name; Sigismund's pagan Lithuanian birth name is unknown.
Sigismund Kęstutaitis (ca. 1365 - 1440), Grand Duke Sigismund I of Lithuania
Sigismund | Sigismund, Holy Roman Emperor | Sigismund III Vasa | Sigismund I the Old | Sigismund II Augustus | John Sigismund, Elector of Brandenburg | Sigismund von Herberstein | Sigismund's Chapel | Sigismund of Burgundy | Sigismund Kęstutaitis | Sigismund I | John Sigismund | War against Sigismund | The Bachs at leisure? The title page to ''Singende Müse an der Pleisse'', a collection of strophic songs published in Leipzig in 1736, by Johann Sigismund Scholze | Sigismund Korybut | Sigismund Koelle | John Sigismund Unitarian Academy | Johann Sigismund Riesch |
A series of privileges by the Grand Dukes (by Sigismund Kęstutaitis in 1434, Casimir IV Jagiellon in 1447, Alexander Jagiellon in 1492, Sigismund I the Old in 1507) released veldamai from their taxes to the state.