Frederik I van Sommerschenburg (about 1060 - 18 August 1120/1121) was a Saxon nobleman. biography
Frederik was Count of Sommerschenburg, Hassegau, Nordthüringengau and the Derlingau. He was also Paltsgraaf of Saxony (1097) and guardian of Schöningen. His own property, especially at Lauchstädt, Allstedt and the Kyffhäuser, he acquired after his uncle and cousins struggled. Frederik was an ally of the Archbishop of Maagdenburg and he was constantly in conflict with the graves of the North Market from the Battle of Stade.
In 1111 he was present in Rome at the coronation of Emperor Hendrik V. When the Saxon nobility led by Gertrudis of Brunswijk, increasingly stepped up against the emperor, he remained faithful to the Emperor for some time. But in 1115 he had also chosen the camp of the insurgents. Hendrik took off all his functions. On February 11, 1115, Frederik was one of the leaders of the Saxony in battle at Welfesholz. Here, the Emperor was standing against the Saxons and a military rebel from Lorraine. The battle was soon over after the emperor's army captain was killed at a superficial charge. The imperial army fled, and Hendrik had lost his power in Saxony and Lorraine.
In 1118, Frederik defeated his cousins by conquering their castle on the Kyffhäuser. In the last years of his life he had a mediating role between the Emperor and his opponents. family
Frederik married Adelheid van Lauffen, widow and heiress of Adolf von Hövel. They received the following children:
Frederik's famous ancestors:
Known ancestors of Adelaide: Everhard van Nellenburg and Ita van Altdorf (approx. 1025 - ca. 1105) Bernard van Werl (approx. 983 - after 1027)
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