Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
VALANCE
As described in historical dictionaries
Patronymica Britannica (1860)
VALANCE. VALLANCE. A place on the contines of Poitou, in France, gave name to William de Valence, who was son of Hugh le Bruu, Earl of March, and Isabel, widow of King John. He came into England in 1247, b)' the invitation of his uterine brother, King Henry III., and was father of the renowned Aylmer de Valence, temp. Edward I.