MacDonald, Macdonald, and McDonald are Anglicised forms of the
Scottish Gaelic name MacDhòmhnaill. It is a patronym where Mac means
"son" and Dhòmhnaill means "of Dòmhnall" [of Donald]. The personal name
Dòmhnall is composed of the elements domno "world" and val "might",
"rule". A meaning which is perhaps not coincidental as the clan have
long assumed the unofficial title of 'Lords of the Isles'. The first
recorded spelling of the family name is shown to be that of
Therthelnac MakDonenalde, which was dated c.1251, a charter witness at
Lesmore, Scotland, during the reign of King Alexander 111 of Scotland,
1249-1286. In the context of Scottish clans, the various forms of the
name refer to one of the largest clans,
Clan Donald. Clan
MacDonald is the most famous and numerous of the long line of Scottish
Highland Clans. The surname is now recorded in every part of the world,
the origination of the chiefs being from one 'Donald of the Isles' in
the 10th century AD.[
Wikipedia,
Surname
Database]