The oldest archive material to mention Jegindø is a seven hundred year old manuscript from a monastery on Zealand. In this manuscript the islans is called Eg-ø (Oak.island), and the island is described as a royal fief the King Valdemar the Second owned a “house”, i. e. a. castle.
The remnants of this castle, the foundation, was cleared away in 1844, while an enormous number of stones where used to wall in a garden. This wall has later disappeared, probably sold as road-surfacing material. The only remnant of our royal “house” then, is the name “Hussted”, which means “houseplace”.