Ranulf was probably born in the Cotentin Peninsula at Soules, the family's seigneurie near Saint-Lô. He was one of the group of young Normans whom David I gathered around him from Henry I of England's area of influence in northern France; he was therefore likely of a similar age to David. As David's tenant, Ranulf held Great Doddington on the former's Honour of Huntingdon. His ties to Great Doddington are confirmed when, as a settler in Scotland, he later grantedthe Church of Great Doddington, to Jedburgh Abbey. He apparently accompanied David to Cumbria around 1112 when the latter was essentially governor or titular earl of that region under England's King Henry and was encouraged by David to buildLiddel Castle in Liddesdale to control that unruly area. According to Tranter, in one of his historical novels, Ranulf was with David at the Battle of the Standard in 1138. Ranulf de Soulis built Liddel Castle, a motte and bailey structure, at the junction of the Liddel and Esk rivers. This castle, the earthworks of which remain, therefore was probably built around 1115-1118, although apparently the first written mention of it was in an 1165 charter that William the Lion granted to the Canons of Jedburgh Abbey. It is not to be confused with nearby Hermitage Castle, a later structure, or with Liddel Strength that was built in the same region, but just within England, by Turgot de Rossedale, from a Yorkshire family.
Cupbearer
David appointed him as his Cup-bearer, the first person in the Norman tradition to hold that office in Scotland; after David's death he was cupbearer to Malcolm IV and later to William the Lion in the early part of his reign. The cupbearer was not a major official at court, but it and other similar appointments gave their possessors influence at court and in affairs of state beyond the duties implied by their titles. Essentially, they became confidants and advisors to the King. The court was highly mobile in these times and court officials, such as the cupbearer, would often accompany the King on his excursions. Ranulf de Soulis witnessed a number of David's, and later Malcolm IV's and William's charters.
Legacy
According to Laurie, Ranulf died shortly before 1170. He was succeeded as Lord of Liddesdale by his nephew, who was also named Ranulf and who was the son of his brother, William.