Donald MacDonald was a male anthropomorphic duck.
In 1411, at a time when the Clan MacDonald ruled over the Hebrides in Scotland, the clan head Donald MacDonald (a namesake and possible ancestor of Donald Duck) decided on a whim to invade the County of Ross. Headed off by a posse comprising the Count of Mar, the Constable of Dundee, the Sheriff of Angus, the Prevost of Aberdeen and a number of city militias, his forces were decimated; Donald MacDonald fled back home, which he never left again until his death in 1423.
Behind the scenes
Donald MacDonald appears in the 1975 story The Famous Donalds.
Donald MacDonald (ドナルド・マクドナルド) also happens to be the Japanese localized name of McDonald's mascot Ronald McDonald.