Otto I of Swabia Duke

  Notater:

Otto I (born 954, died 31 October or 1 November 982) was the Duke of Swabia from 973 and Duke of Bavaria from 976. He was a member of the Ottonian dynasty, the only son of Duke Liudolf of Swabia and his wife Ida, and thus a grandson of the Emperor Otto I and his Anglo-Saxon wife Eadgyth. His sister Mathilde was the abbess of Essen Abbey.

Otto was only three years old when his father died in 957. He was raised at the court of his grandfather, Otto I, who seems to have adopted him and raised him alongside his own son, the future Emperor Otto II, born late in 955. The latter regarded him as both "nephew and brother" (nepos ac frater). When the childless Duke Burchard III of Swabia died in 973, Otto II transferred the Swabian duchy to his nineteen-year-old nephew and brother, whose father had been Burchard's predecessor. The elder Otto became a close confidante of his younger sovereign.