Au contraire mon frere. I had a Scottish math teacher in middle school and he was very adamant it was MacDonald and not to confuse his name with the popular chain.
https://en.wikipedia.org/wiki/Macdonald#:~:text=The surname is an Anglicised,might"%2C "rule".
The surname is an Anglicised form of the Scottish Gaelic and Irish Gaelic MacDhòmhnaill or Dòmhnallach.[2] The name is a patronym meaning "son of Dòmhnall". The personal name Dòmhnall is composed of the elements domno "world" and val "might", "rule".[3] According to Alex Woolf, the Gaelic personal name is probably a borrowing from the British Celtic Dyfnwal.
In the context of Scottish clans, the various forms of the name refer to one of the largest clans, Clan Donald. In Ireland the name is largely from this root but may sometimes be a synonym for MacDonnell, which itself may be of distinct Scottish Clan Donald galloglass or native Irish origins.[4]