Hi All,
Ancestry and Kindred Konnections have the same basic info on Clemence:
b. c 1162 in England d. 1201 in Wales, listed as "Princess of Brittany"
m. c 1200 Nicholas De Verdun in England [b. c 1175 Alton, Staffordshire, England]
issue: Rose [Clemence must have died in childbirth]
Two sources mentioned:TAG 35: 29-32, Oxford Illustrated History of the British Monarchy
Terry