Hartmann II of Kyburg

Hartmann II of Kyburg (c. 1299–1322) succeeded his father Hartmann I as count in 1301, as a child under guardianship. In 1319 he married Margaret of Neuchâtel, but the marriage was childless.

When his clerical younger brother Eberhard II demanded a share of the inheritance, Hartmann had him imprisoned. A reconciliation at Thun Castle on 31 October 1322 turned violent after drinking, and Hartmann fell from a window and died. Backed by Bern, Eberhard then seized the county.