• Motto: Per mere per terras - By sea and by land
• Badge: A hand in armour in fess, proper, holding by the point a cross crosslet fitchy, gules.
• Tartan: MacDonald of Sleat
• Gaelic Name: MacDhòmhnuill
• Plant Badge: Heath
• Origin of Name: Gaelic Domhnull (world ruler)

Donald Gorm, 5th of Sleat, claimed the Lordship of the Isles and the Earldom of Ross. He took possession of Trotternish and invaded Kintail, but was killed when attempting to capture Eileandonnan Castle in 1539. Donald Gormeson, 6th of Sleat, died in 1585 and was succeeded by his son Donald Gorm Mor, 7th of Sleat. He raided the MacLean lands in Mull, but after a second defeat Donald was taken prisoner by the MacLeans, but was released by order of the Government who were now taking stronger measures to secure peace in the Western Highlands. Donald and other chiefs were imprisoned in Edinburgh, were heavily fined, and then released. In 1610 Donald and five other chiefs attended Edinburgh, agreed to keep the peace, and to aubmit all disputes to the ordinary courts of law.

Donald died without issue in 1616, and was succeeded by his nephew, Sir Donald, 8th of Sleat, and 1st Baronet of Sleat. He was created a Baronet of Nova Scotia in 1625. Sir James, 2nd Baronet, joined Montrose,a nd in 1651 sent a force to assist Charles II in England. Sir Donald, 4th Baronet, known as "Donald of the Wars", had his estates forfeited for his part in the rising in 1715. The estate was repurchased for the family during the lifetime of Sir Alexander MacDonald, 7th Baronet. Sir Alexander, 9th Baronet of Sleat, was created in 1766 Baron MacDonald of Slate in the peerage of Ireland.

Text taken from Robert Bain's "The Clans and Tartans of Soctland