The origin of surname Leroux is the French region of Picardy, where the first members of the lineage took the name of the town Delor.

The name is of occupational origin Laure and given to people working in Granary.

Some variaiones of this family name include: Delor, De Lor, Delore, DeLaura, Laur, Delaure, Deloret, De Loret, Delauret, De Lauret, Delorey, De Lorey Delaurey, De Laurey, Lore, Loree, L'Oree, Laur, Laure Lauree, Loret, Lauret, Lorey, Laurey, Loriet, Lauriete, Loriey, Lauriey, Deloreti, Delaureti, Deslor, Delor, Deslor, Delaura, Desloret, Deloret, Deloriet, Delory and others.