The primary source which confirms his parentage has not yet been identified, although his naming his oldest son Ekkehard suggests a close family connection with the senior Graf Ekkehard. "Otto…imperator augustus" confirmed the appointment of Pope John XII by charter dated 13 Feb 962, signed by "Eberharti comitis, Guntharii comitis, Burgharti comitis, Utonis comitis, Cuonrates comitis, Ernustes".
Markgraf in the bishopric of Magdeburg 968: "Otto…imperator augustus" set out his plan to elevate the bishopric of Magdeburg to an archbishopric by an undated charter, placed in the compilation with other charters dated 968, in which he names "marchiones nostros Vuigbertum, Vuiggerum et Guntherium". "Otto…imperator augustus" donated "civitatem Zuenkouua…in regione Chutizi et in comitatu Gundherii comitis" to the church of Merseburg by charter dated 30 Aug 974. He went to Calabria in 979.
The Annales Einsidlenses record that "Uto et Guntharius duces…Berehtaldus comes" were killed fighting the Sarracens in Sicily in 982. The necrology of Fulda records the death in 982 of "Gundheri com".
The name of Gunther's wife is not known. 1
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