Thankmar [SEP] place of death
, in 937, Thankmar claimed Merseburg. Otto, however, appointed Gero, Siegfried's brother. During this dispute, Eberhard of Franconia and Wichmann the Elder revolted against Otto and Thankmar joined them. Later, Thankmar was besieged in Eresburg. He was killed by a spear thrown through the window of the church of Saint Peter, while he was seeking refuge inside.
Sources.
- Reuter, Timothy. "Germany in the Early Middle Ages 800–1056". New York: Longman, 1991.
- Bernhardt,
arrangement ratified by an assembly at Erfurt, just before his death. After his death, his lands and wealth were divided between his four sons: Thankmar, Otto, Henry, and Bruno. Otto, however, was designated by his father to receive the crown. The only succession dispute was between Otto and his younger full brother Henry, who was kept under house arrest in Bavaria during Otto's coronation. 
After the death of his cousin, Siegfried, Count of Merseburg (they were related in the maternal line)