Q: the 'Mc' in McKenzie or in McDonald's とはどういう意味ですか?
A: Mc means "son of" or just "son" in Gaelic. It is commonly used in names of Irish or Scottish descent
Q: Mc mean when it's put before a surname. For example, Mc in McCartney or McMorris とはどういう意味ですか?
A: As kamiiru says, it's a very old naming tradition. It was originally used by Gaelic-speaking people in Scotland and Ireland. Now most people just inherit their father's name.


Q: Mc Yooness Ma
narr は 英語 (アメリカ) で何と言いますか?
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Q: what is Mc mean in English? は 英語 (イギリス) で何と言いますか?
A: It's used in Scottish names mostly


Q: Mc Donald’s の発音を音声で教えてください。
A: QAの全文をご確認ください
Q: I think that Mc Donald's apple pie is the best I've ever eaten. Have you ever eaten it?
A: Your sentences are correct.
Q: I want to eat at Mc Donald この表現は自然ですか?
A: I want to eat at McDonald’s.

The name of the restaurant is “McDonald’s.”

Your pronunciation is perfect!😄
Q: What does Mc in McDougal mean?
How do you pronounce Mc? Is it like Mike?
A: thank you. Your inference is right.
I think Mc is from Mac. Here is what I found in a dictionary.
casual, generic term of address for a man, 1928, from Irish and Gaelic mac, a common element in Scottish and Irish names (literally "son of;" see Mac-); hence used generally from early 19c. for "a Celtic Irishman." FROM: etymonline