GERBERGA ([975/80]-after 1036). Thietmar names "Ottone germano sui", referring to Gerberga wife of Heinrich von Schweinfurt, whose captivity is recorded in the preceding paragraph, an earlier paragraph referring to "Heriberti comitis filio Ottone" which appears to refer to the same Otto[324]. An alternative possibility is that Gerberga was the daughter of Otto Graf von Grabfeld (see below), the solution chosen by Europäische Stammtafeln[325], but this assumes that the two references to "Otto" in Thietmar were to different individuals. It is also less likely chronologically as it would appear that Otto Graf von Grabfeld was several decades older than Otto Graf von Hammerstein. Her birth date range is estimated on the basis of her daughter Eilika having given birth to her first child in [1020]. Thietmar states that Gerberga and her children were guarded by her husband's brother Bukko during their rebellion against Heinrich II King of Germany in 1003[326]. m (before 1003) HEINRICH von Schweinfurt Graf im Nordgau, son of Graf BERNHARD & his wife Eilika von Walbeck ([970/75][327]-18 Sep 1017, bur Schweinfurt).