The surname Denys was borne by at least three prominent mediaeval families seated in Gloucestershire, Somerset and Devon in southwest England between 1166 and 1641.
White Hall Hospital in Ilchester was founded in about 1217–1220 by William Dacus/Le Deneis of Sock Dennis, following his gift of a house and other property.
Orleigh formed a sub-manor of Pancrasweek, but was held by him under the non-military tenure of free socage, that is to say it was a heritable estate the service for which was monetary not military.
[6] Dacus held two fees in total from de Pomeroy, as stated in his 1166 return, and the identity of these fees are revealed in the record of the holdings of his descendant Robert le Deneys in the feudal aid of 1285 which shows Pancrasweek forming one, Southwick in Germansweek and Manaton (14 miles north of Berry Pomeroy Castle) forming a half each.
[citation needed] A history of this family is contained in the Duchess of Cleveland's "Battle Abbey Roll", under "Denise".
[7] A cadet branch of Dennis of Orleigh settled at Holcombe Burnell, 3 miles west of Exeter, and Bicton, 10 miles SE of that city, and bore the arms of Orleigh differenced: Ermine, three Danish battle axes gules (three red battle-axes on a white background with black ermine spots).