Hagerty
An Irish surname usually understood as a variant of Hegarty, ultimately from a Gaelic personal-name form.
The #5,983 most common surname in the United States (2010 Census) — about 1 in every 53,695 Americans shares it.
Etymology
Hagerty is generally treated as an Anglicized variant of Irish Hegarty, with spellings varying widely in older records. The name is usually linked to the Gaelic surname O hEagartaigh, traditionally explained from a personal-name element meaning something like "vigilant" or "watchful," though older sources sometimes preserve only the anglicized family forms rather than a full derivation. The historical spellings Hagarty, Hegarty, Hegerty, and Haggerty all reflect the same Gaelic source as it was rendered into English.
History
The surname is especially associated with Ireland, where the Hegarty/Hagerty spellings are well established in historical records. The excerpts show that 19th- and early-20th-century genealogical writers treated Hagerty as one of several interchangeable spellings of the same family name. In the United States it remained a relatively uncommon Irish surname, but it has been steadily present through immigration and later generations.
Origin
Regions
Variant spellings
Fun fact
Older surname indexes often list Hagerty right beside Hegarty and Haggerty, showing how fluid Irish spelling could be before standardization.
From the historical record
“0 hA5AticAi5, Agarty, Hagarty, Hagerty, Hegarty, Hegerty, Heggerty, etc. C h-A^AitTTAij. Hearty ; Hegarty. 0 h/AjmAill, O'Hamill, Hamill,”
— Sloinnte Gaedheal is Gall: Irish names and surnames