After Adalbert's death, Siegfried's mother remarried twice, to two successive counts palatine of the Rhineland: first, Hermann II (d.1085), and then Henry of Laach (d.1095).[4] After Henry's death, Siegfried claimed his title of count palatine of the Rhineland (r.1095/7-1113).[5]
Influenced by the First Crusade, Siegfried is thought to have travelled to Jerusalem.[6] In 1112 he is also said to have completed the foundation of Maria Laach Abbey, begun in 1093 by his mother, Adelaide, and his stepfather, Henry of Laach.[7]
In 1112 Ulric II of Weimar-Orlamünde died without heirs. By virtue of his mother, Adelaide's, kinship, Siegfried then claimed Ulric's title.[8] This led Siegfried into conflict with Emperor Henry V. Imperial partisans attacked Siegfried at the Teufelsmauer in the Harz on 21 February 1113. Siegfried survived the attack, but died of his injuries on 9 March 1113.[9]
Gerold Meyer von Knonau, 'Sigfrid (Graf von Ballenstedt), Pfalzgraf von Lothringen,' in Allgemeine Deutsche Biographie, vol. 34 (Leipzig, 1892), pp. 257f.