:''The article is about the historical figure. For the Japanese magazine, see
Gunzo''.
Gunzo (also ''Cunzo'') was a 7th-century duke of the
Alamanni under
Frankish sovereignty. His residence was at ''villa Iburninga'' (today's
Ãœberlingen
Überlingen (; ) is a German city on the northern shore of Lake Constance (Bodensee) in Baden-Württemberg near the German-Swiss border, border with Switzerland. After the city of Friedrichshafen, it is the second-largest city in the Bodenseek ...
) at
Lake Constance
Lake Constance (, ) refers to three bodies of water on the Rhine at the northern foot of the Alps: Upper Lake Constance (''Obersee''), Lower Lake Constance (''Untersee''), and a connecting stretch of the Rhine, called the Seerhein (). These ...
. Gunzo was the father of
Fridiburga, who was engaged to Frankish king
Sigibert II (who was murdered in 613).
Gunzo organized a synod in
Konstanz in 635, which resulted in the election of deacon
John of Grab as bishop of Constance, succeeding the deceased bishop Gaudentius. This event is the earliest certain attestation of Constance as an independent bishopric.
It is disputed whether Gunzo ruled over all of
Alemannia, or only over the eastern part. If the former is the case, he is to be identified either with
Gundoin, the founder of the
Moutier-Grandval monastery, or with the predecessor of the latter, duke
Uncilin.
Alemannic monarchs
7th-century dukes in Europe
7th-century Germanic people