Anglicized form of Gaelic Domhnall. The final -d of the Anglicized form derives partly from misinterpretation by English speakers of the Gaelic pronunciation, and partly from association with Germanic-origin names such as Ronald. This name is strongly associated with clan Macdonald, the clan of the medieval Lords of the Isles, but is now also widely used by families with no Scottish connections.
English: Black identifies this as a habitational name from the lands of Westhall in the parish of Oyne, Aberdeenshire. However, the surname now occurs predominantly in England, particularly Berkshire, which suggests that an additional or a different source may be involved.