Gann
A surname found in Irish, Germanic, and English records, often treated as a short form of a longer name rather than a single fixed origin.
The #2,780 most common surname in the United States (2010 Census) — about 1 in every 23,801 Americans shares it.
Etymology
The surname Gann is difficult to pin to one source because historical writers connect it with more than one name tradition. In Irish surname material, it is often grouped with forms such as Magann/Magann-like spellings, suggesting a Gaelic origin in some families. Other old surname lists also place Gann among short, similar-looking Germanic or English names, but they do not give a single clear derivation.
History
Because the name appears in several different surname lists, Gann likely arose independently in more than one region or was absorbed into spellings of similar-sounding names. In Ireland, it may be linked to Gaelic patronymic forms, while in English-speaking records it also seems to function as a short surname or variant form. The modern U.S. distribution may therefore reflect mixed ancestry rather than one family line.
Origin
Regions
Variant spellings
Fun fact
The name was already being cataloged by 19th-century surname scholars, but even then it was treated as a bit of a puzzle rather than a settled etymology.
From the historical record
“gearr, short] MAC GANN for Mac Cann, q.v. MAC GARRICK for Mac Capriok, q.v. MAC GARRY (Celt.) Son of Garry (q.v.) or GadhaR: v. O'Gara.”
— Surnames of the United Kingdom: a concise etymological dictionary (2 vols in 1)