McGlynn
An Irish surname usually understood as meaning “son of Glynn/Glinn,” with a likely Gaelic origin tied to a personal or place-name element.
The #7,880 most common surname in the United States (2010 Census) — about 1 in every 73,511 Americans shares it.
Etymology
McGlynn is an Anglicized Irish surname built on Mac, meaning “son of,” plus a Gaelic name element represented in older spellings as Glinn, Glynn, or Glinn. Nineteenth-century writers sometimes connected it with the genitive form of glinn, glossed as “the bright heavens,” but that explanation is not certain and may reflect an older speculative etymology. More cautiously, the name is best treated as an Irish patronymic formed from a Gaelic byname or local-name element now obscured by later spelling.
History
The surname is found in Irish records in several spellings, including McGlinn and McGlynn, and the variant McGlynn became especially common in English-language usage. Like many Irish surnames, it spread widely through migration in the 19th and 20th centuries, especially to Britain, North America, and other English-speaking regions. The historical sources also show close spelling variation among McGlinn, McGlinn, and McGlynn, suggesting a shared origin rather than separate surnames.
Origin
Regions
Variant spellings
Fun fact
Older surname collections sometimes group McGlynn with a cluster of similar Irish names, showing how unstable Gaelic spellings could be before standardization.
From the historical record
“12 'McGlynn (26), 39 McGoey, , .”
— Special Report on Surnames in Ireland (numerical strength, derivation, distribution)