Many of the families of the name FERGUSON were established in Scotland at an early date. FERGUSON are classed among the septs of Mar and Athol. In Argyll where the clan is numerous they held lands in Strachur until the beginning of the 19th century.
Early records of the name mention Donald filius Fergucci, 1376. Robert 1 granted lands in Ayrshire to Fergus, son of Fergus in 1466. Mychel Fargisone was admitted burgess of Dunfermline. James Fargesoun was put in ward for taking part in a medieval play in Perth in 1582. The name has many variant spellings which include Farguesonne, Fargusone and Fergowsone. The use of fixed surnames or descriptive names appears to have commenced in France about the year 1000, and such names were introduced into Scotland through the Normans a little over one hundred years later, although the custom of using them was by no means common for many years afterwards. During the reign of Malcolm Ceannmor (1057-1093) the latter directed his chief subjects, after the custom of other nations, to adopt surnames from their territorial possessions, and there created 'The first erlis that euir was in Scotland'. This Scottish name is numerous in Ulster. It is used as a synonym of Fergus in County Antrim. Ferguson is one of the forty most commonest names in Scotland and was brought to Ulster by settlers, most of whom came with the plantation schemes in the first quarter of the 17th century. Alba, the country which became Scotland, was once shared by four races; the Picts who controlled most of the land north of the Central Belt; the Britons, who had their capital at Dumbarton and held sway over the south west, including modern Cumbria; the Angles, who were Germanic in origin and annexed much of the Eastern Borders in the seventh century, and the Scots. The latter came to Alba from the north of Ireland late in the 5th century to establish a colony in present day Argyll, which they named Dalriada, after their homeland. The Latin name SCOTTI simply means a Gaelic speaker.