John Walker was born on 25 July 1805. His farmer father died in 1819, and the family sold the farm. Their trustees invested the proceeds, £417, in an Italian warehouse, grocery, and wine and spirits shop on the High Street in Kilmarnock, Ayrshire, Scotland. Walker managed the grocery, wine, and spirits segment as a teenager in 1820. The Excise Act of 1823 relaxed strict laws on distillation of whisky and reduced, by a considerable amount, the extremely heavy taxes on the distillation and sale of whisky. By 1825, Walker, a teetotaller, was selling spirits, including rum, brandy, gin, and whisky.
In short order, he switched to dealing mainly in whisky. Since blending of grain and malt whiskies was still banned, he sold both blended malt whiskies and grain whiskies. They were sold as made-to-order whiskies, blended to meet specific customer requirements, because he did not have any brand of his own. He began using his name on labels years later, selling a blended malt as Walker’s Kilmarnock Whisky. John Walker died in 1857.