MacDonald, Macdonald, and McDonald are surnames of Scottish Origin.In the Scottish Gaelic and Irish languages they are patronymic, referring to an ancestor with given name Donald.. Origins and variants. The surname is an Anglicised form of the Scottish Gaelic and Irish Gaelic MacDhòmhnaill or Dòmhnallach. The name is a patronym meaning ‘son of Dòmhnall’. The personal name Dòmhnall is …

