This family originated in Monthault, Ille-et-Vilaine, in the Duchy of Brittany, not then part of France, but it has been proposed that they took their name from 'mont haut', meaning 'high hill', and associated it with this earthwork.

[4] It switched hands on several occasions before a long period under Welsh control during the reign of Llywelyn ab Iorwerth.

During the English Civil War, Mold was captured by the Parliamentarians, recovered by the Royalists and fell again to Cromwell's forces.

They have created a memorial garden to honour the soldiers of Mold who fell in World War I, and this incorporates the castle site.

[6] In the course of the work, in 2020 excavations by the Clwyd-Powys Archaeological Trust revealed the remains of a large masonry wall on the edge of the inner bailey, which could have been part of the fortifications or an internal building[7] and suggested the original castle may have been timber.