Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
ALLSOP
As described in historical dictionaries
Patronymica Britannica (1860)
ALSOP. ALLSOP. This ancient nice were seated at Alsop-in-the-Dale, in Derbyshire, about the time of the Conquest, and there continued in an unijiterruptcd descent for 19 or 20 generations.
Surname type: Location or geographical feature
Origin: English
Region of origin: British Isles
Country of origin: England
Religion of origin: Christian
Language of origin: English