Sigulph or Ligulph FitzForne

In 1069, Llyulph de Greystoke, after whom Ullswater is named, was regranted his lands by the Normans, following their successful conquest. The wooden tower he had built at Greystoke, which was surrounded by a high fence or pale (pele), was replaced with a stone-built tower. Eighteen generations of de Greystoke lived in it. (http://greystoke.com/history-and-heritage)

From Wikipedia - Greystoke Castle

Greystoke Castle is in the village of Greystoke 8 km west of Penrith in the county of Cumbria in northern England. (grid reference NY435309). In 1069, after the Norman conquest the Saxon chieftain Llyulph de Greystoke was re-granted his land and he built a wooden tower surrounded by a pale (or pele). The first stone structure on the site was built in 1129 by Ivo, his grandson. The building grew to become a large pele tower and in the 14th century after William de Greystoke obtained a royal licence to castellate it, the castle was further enlarged.

https://thehistoryjar.wordpress.com/tag/llyulph-de-greystoke/

The parish church of St Andrews in Greystoke had seen some difficult times by the seventeenth century. It was first built in stone in 1255. Its key feature was a defensible tower where villagers could take shelter when the Scots came raiding. It’s ironic that the name St Andrew is a reminder that in 1066 this part of Cumbria was in Scotland where it remained until the reign of William Rufus. A wooden church may have stood upon the site when Ranulph de Meschines gave the land into the hands of Llyulph or Ligulph a local man. The Barony of Greystoke was confirmed to his son by Henry I.