Arthur, William (1857) An Etymological Dictionary of Family and Christian Names. New York: Sheldon, Blakeman. Public Domain.
LAWRENCE
As described in historical dictionaries
An Etymological Dictionary of Family and Christian Names (1857)
Flourishing, spreading, from Laurus, the laurel-tree. Sir Robert Lawrence, of Ashton Hall, Lancashire, England, accompanied Richard I. to the Holy Land, 1191.
Patronymica Britannica (1860)
SAINT LAWRENCE. This family (the Earl of Howth's) claim to have been barons by tenure of Howth, in Ireland, ever since the conquest of that kingdom by King Henry II., the ancestor having assisted in Strongbow's invasion. He was doubtless of Norman extraction, and he may have come either from St. Lawrent, near Bayeux, or from the place of the same name near Yvetot.
Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
Surname type: From given name or forename
Origin: English
Region of origin: British Isles
Country of origin: England
Religion of origin: Christian
Language of origin: English