Counts of Winterthur

The Counts of Winterthur were a Swabian noble family, a branch of the Udalrichinger dynasty, who ruled parts of Thurgau in the 10th and 11th centuries.

They are named for the Alemannic settlement at Vitudurum, but their rule predates the foundation of the city of Winterthur in 1180.

Liutfried's younger son Werner of Kyburg (d. 17 August 1030, not to be confused with his grandson Werner I of Winterthur) was a friend of Ernest II, Duke of Swabia, who after his failed against emperor Conrad II sought refuge in Kyburg castle.

Adalbert's son Werner I (c. 990–1040) (de) was appointed landgrave in Hessengau (Maden) by Conrad II in 1027 before succeeding his father as count in 1030.

Werner was bearer of the Reichsfahne (imperial flag) under Conrad II and Henry III and he died in the battle at Brůdek against Bretislav I.