Thimo was a younger son of Margrave
Theodoric II, Margrave of Lower Lusatia and his wife Mathilda, a daughter of Margrave
Eckard I of Meissen. When his father was killed in 1034, Thimo succeeded him in his Wettin and Brehna home territories. He also served as
Vogt (bailiff) of the
Naumburg diocese and of the Wettin family monastery in
Gerbstedt. In the
Saxon revolt of 1073–1075, Thimo fought against King
Henry IV and also quarreled with his brother Bishop Frederick of
Münster. Later he again approached the king and in 1088 attended the
Hoftag diet in
Quedlinburg, where the
Brunonid margrave
Egbert II of Meissen was deposed. The exact year of Thimo's death is unclear; since his son
Conrad was born in approximately 1098, Thimo cannot have died long before this year. Alternatively, some researchers assume that Thimo was in fact Conrad's grandfather and that Conrad's father was an unknown son of Thimo's with the same name, making a death year of 1090/91 possible, as given in a chronicle. However, since Thimo II is not otherwise attested, this is considered unlikely. Thimo was buried at the monastery of
Niemegk in Saxony-Anhalt, which he had founded. ==Marriage and children==