A settlement of servants and manual workers grew up around the castle and this became the village of Castlethorpe (thorpe is an Old Norse language (particularly Danish) word for homestead, and it is not unreasonable to assume that there may well have been a Danish settlement nearby as the area was, if not part of, certainly close to, the Danelaw).
Castlethorpe Castle stood in the village of Castlethorpe, to the north of Milton Keynes, Buckinghamshire.