She is known for having been subjected to a witch trial by her father-in-law, who objected to her marriage to his son, but failed to have her condemned and instead had her imprisoned and murdered.

It has been believed the name Deseniška derives from the village of Desinić in Croatia, where Frederick also had extensive estates, and it appears in the forms Dessnitz, Dessenitz, Desnicze, Teschnitz, Teschenitz, and Dessewitz in various historical sources.

She was possibly employed as a lady's maid to Elizabeth of Frankopan, the first wife of Frederick II, Count of Celje.

The chronicles of the Counts of Celje suggest he had his son arrested and, while holding him prisoner, initiated a witch trial against Veronika, accusing her of having enchanted Frederick and attempted to murder Hermann II by poison.

[1] Veronika and Frederick's tragic love story, which also marked the beginning of the end of the House of Cilli, has been an inspiration for numerous literary creations.