Fannin
An Irish surname that likely began as a form of Fanning or a related Gaelic name, especially in Ireland’s southwest.
The #5,092 most common surname in the United States (2010 Census) — about 1 in every 44,922 Americans shares it.
Etymology
The historical sources group Fannin with Irish surnames such as Fanning, Finan, Finnan, and Fannon, suggesting it is a related Anglicized Irish form rather than a separate English word-name. The deeper Gaelic root is not settled from these excerpts alone, but it likely reflects an old Irish personal or family name that was later standardized in English spelling. In practice, Fannin is often treated as a variant or shortened form within this cluster of Irish surnames.
History
The name appears in Irish surname lists and county distributions recorded by early 20th-century scholars, with concentration in the south and southwest of Ireland. The census-style notes in Matheson show Fannin as a recognized but relatively uncommon Irish surname, often discussed alongside Fanning. Later migration carried the name to North America, where it remains much rarer than Fanning.
Origin
Regions
Variant spellings
Fun fact
Early Irish surname indexes sometimes list Fannin only as a clustered variant, which is why it can be easy to miss in older genealogical records.
From the historical record
“■pASAtJ, Fyans, Foynes. ITAinin, Fannin, Fanning. ■pAi|ifin5, Farshin, Fortune. jTaIcac, Wall.”
— Sloinnte Gaedheal is Gall: Irish names and surnames