The Barony of Giffen and its associated 15th-century castle were in the parish of Beith in the former District of Cunninghame, now North Ayrshire. The site may be spelled Giffen or Giffin and lay within the Lordship of Giffin, which included the Baronies of Giffen, Trearne, Hessilhead, Broadstone, Roughwood and Ramshead; valued at £3,788 9s 10d. The Barony of Giffen comprised a number of properties, including Greenhills, Thirdpart, Drumbuie, Nettlehirst and Balgray, covering about half of the parish of Beith. Giffen was a hundred merk land, separated from the Barony of Beith, a forty-pound land, by the Powgree Burn which rises on Cuff hill. The Lugton Water or the Bungle Burn running through Burnhouse may have been the Giffen barony boundary with that of the adjacent barony and lands of Aiket castle. Giffen has a recorded history that covers many familiar aspects of a feudal barony, including the possession of a moot hill or justice hill, here represented by 'Greenhills', as well as a thirled mill and a 'gathering place' known as the 'Borestone'. Other features such as the old chapel and the holy well add to the expected features, most of which no longer survive. Etymology Giffen is a Brittonic place name. It is named either from *cemno, meaning "ridge" (c.f. Welsh ), much like The Chevin in West Yorkshire, England, or , a word adopted from Latin meaning "a common/shared boundary" (Welsh ). The history of Giffen Castle The tower castle of Giffen lay near to the existing Mains of Giffen site on the summit of a whinstone trap ridge at (NS 37727 50718). MacGibbon and Ross suggest that Giffen Castle was built in the 15th century, although the 13th-century (1233) land grant to Walter de Mulcaster, and the prior existence of a chapel, suggest that a defensive structure of some sort was present at that date. At the time of Pont's survey (J Dobie 1876), it was a tower square, high, with walls thick. It fell into disrepair soon after 1726 and finally collapsed in 1838. It has also been recorded as 'Griffen' on some old maps of the district. The castle was acquired by Sir John Anstruther in the early 18th century and he is responsible for allowing it to become a ruin, together with the associated Giffen farm. The sundial originally in the Giffen castle garden was sold and was moved eventually to Crummock house,