The surname McDonough is of Irish origin, derived from the Gaelic name "Mac Donnchadha," meaning "son of Donnchadh." Donnchadh is a personal name that translates to "brown warrior." The McDonough surname is commonly found in Ireland, particularly in counties such as Galway and Mayo. It is a patronymic surname, indicating descent from a male ancestor named Donnchadh.
Ranked #1655 nationally, Mcdonough appeared 21739 times in the U.S. Census. It’s not rare, but also not widespread — about 7 people per 100,000 carry it.
Our database contains over 3113 people with the last name Mcdonough. This surname is most commonly found in New York, Pennsylvania, Florida. We have over 3 unique first names combined with the last name Mcdonough in our records. The most frequent first names associated with this surname are John, Michael, James.
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