La William Mayo Traiteur

La William is a renowned Belgian brand specializing in cold sauces since 1963. The brand was founded in Londerzeel, Belgium, by the Willems family, who initially focused on crafting high-quality sauces for the local Belgian market. It is most famous for creating the original 'Andalouse' sauce.

The production of La William sauces remains centered in their dedicated manufacturing facility in Londerzeel, Belgium. This ensures that the authentic recipes and local quality standards are maintained. Historically a family-owned venture, the brand transitioned into a professional corporate structure and is currently owned by the management through a buy-out/investment structure, maintaining its independence as a Belgian producer without being absorbed by global conglomerates like Unilever or Nestlé.