In both this country and England the names Damron and Damerel have at times been used interchangeably until about 100 years ago. I found the following on page 220 of "The Norman People", reprinted from the 1874 London edition in 1989 by the Geneal. Publ. Co., Baltimore. The author was not named.
"Damarel, D'Aumerle, or De Albemarle, descended from William de Albemarle, Baron of Fougeres, Bretagne, who obtained grants at the conquest." He is mentioned in Wace as at Hastings, and had Robert de A., a great Baron in Devon 1086, whose descendants long continued in Devon (Pole) and of whom William D'Aumarle had a writ of summons 1367 to Parliament with other barons and prelates. The name became Damarel."
On page 232: "Dumbrell, from Dumerle, connected armorially with Damarell of Devon, descended from Robert de Aumerle or Albemarle, a baron in Devon, 1086,"