The House of Trojden was a dynasty originated by Trojden, earl of Kovir. While it was expected that the House pay tribute to the king of Redania, they chose not to and passed all titles on to family members. As a result, they were not welcome in Tretogor nor were they invited to any official ceremonies.
The first coat of arms, used by Trojden, is based on Ciri's family tree from The Witcher 3: Wild Hunt. Second one, made by Mboro, depicts coat of arms of the dynasty after marriage of Gedovius and Gemma. Since this event the crest contains both Redanian Eagle and Kaedweni Unicorn. 
Family members Edit