"In Québec [...], the name LAURIN is only a variant of LORRAIN and means a person who comes from Lorraine" (37)

"The surname LORRAIN is associated with the name of many ancestors who, in principle, come from the french province of the Lorraine. We also find the name under the spelling of LAURIN which is a diminutive form of LAUR, name of a saint from the middle ages The LORRAIN and LAURIN of today in North-America, like the LARIN of past generations, are mostly all descendants of Pierre Lorrain dit Lachapelle. The LAURIN version of the name is therefore only a fancy spelling of the original name, which is a common practice in the history of names in North-America. The feminine name LORRAINE is around, however a rare variant."(38)

"LAUR is a christian baptism name which only the feminine version LAURE has survived today. Saint LAUR was revered in the middle ages and several places of worship are dedicated to him"(37)

Other variants of the name: LORIN, LORRIN, LORAIN, LAURRAIN, LAURAIN, LAURRIN, LARIN.

Map of the Regions of France(39). "Lorraine is the name of the inhabitant of the Lorraine region [north-east France], with a few variants of the name that comes from this province, such as: Lorrain, Laurin et Larin."(38)

References:
37. Translation from the book "Votre nom et son histoire - Les noms de famille au Québec" by Roland Jacod, pages 110-111
38. Translation from the book "Votre nom et son histoire - Les noms de famille au Québec" by Roland Jacod, pagea 132-133
39. www.CartesFrance.fr