Muchland derives from Michael’s Land after Michael le Fleming, who was granted the manor of Aldingham by Henry I around 1107.
In the mid 13th century, Michael de Furness died crossing the Leven Sands in Morecambe Bay after dining at Cartmel Priory . The manor passed to the Cantsfield family from Lancashire through Michael’s sister Alina.
The advance of the sea eroded the hill on which the motte at Aldingham stood. Richard de Cantsfield moved the seat of the manor inland to Gleaston, where a wooden hall was built about 0.5 km north of the present village.
When Alina and Richard’s son William was drowned in the River Severn, the manor passed again through a female heir to the de Harrington family from north west Cumbria.
The son of that marriage, John de Harrington was knighted in 1306 and was created First Baron Harington of Aldingham upon being summoned to Parliament in 1326. He was responsible for the building of Gleaston Castle bewteen 1325 and 1340, on the site of the previous hall.
There were devastating raids of the Scots in 1316 and 1322.
The de Harringtons gained land in Devon, Cornwall, Leicestershire, Ireland, and further land in Cumberland and Westmorland.
The male heir, William Bonville was killed at the Battle of Wakefield in 1460 with his father and grandfather. He left a new born baby girl, Cecilia. She later married Thomas Grey, 1st Marquis of Dorset, who was grandfather to Henry Grey, 1st Duke of Suffolk, who was father of Lady Jane Grey who became Queen of England.