Mahaffey
An Irish surname, usually an Anglicized form of Gaelic names built on a personal name meaning “beloved” or “pleasant.”
The #4,400 most common surname in the United States (2010 Census) — about 1 in every 38,216 Americans shares it.
Etymology
Mahaffey is generally treated as an Anglicized Irish surname. It is usually linked to Gaelic forms such as Mac an Mhaithfhidhir or similar local variants, which point back to a personal name with the sense of “good,” “pleasant,” or “beloved.” The exact Gaelic source can vary by family line, so the name is best understood as an Irish surname of uncertain but Gaelic patronymic origin.
History
The surname is found mainly among families of Irish origin, especially in Ulster and in the wider Irish diaspora. Like many Gaelic surnames, its spelling was reshaped in English records, producing forms such as Mahaffy and Mahaffie alongside Mahaffey. It became established in North America through Irish migration in the 18th and 19th centuries.
Origin
Regions
Variant spellings
Fun fact
Mahaffey and Mahaffy are often treated as spelling relatives rather than completely separate surnames, reflecting the looseness of English spelling in older records.