Crumley's

A department store in the Maul in Ankh-Morpork. It appears in Hogfather, where the general manager (Vernon Crumley) is sore distressed at the unscheduled visit of the real Hogfather's sled and its four extremely porcine attendants.

Possibly the Discworld manifestation of Arnold Bros (est. 1905)? Although if this one has Nomes living in the walls and floorspaces, Discworld gnomes would be very apparent, especially in the Wines and Spirits department... although the name also resonates with the famous London toyshop, Hamleys.