Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
LANG
As described in historical dictionaries
Patronymica Britannica (1860)
gp LANG. A common prefix to names of places which have become surnames, as in Langhourne, Langshaw, Laugton, Laugridge, Langford, Langdale, i.e., respectively, the long stream,- wood, -enclosure, -ridge, -ford, -dale.
Surname type: Nickname
Origin: English
Region of origin: British Isles
Country of origin: England
Religion of origin: Christian
Language of origin: English