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: topographic name or metonymic occupational name for someone who lived by or worked at a barn or barns, from Middle English barn ‘barn’, ‘granary’. In some cases, it may be a habitational name from Barnes (on the Surrey bank of the Thames in London), which was named in Old English with this word.