All surnames

Irish surname

Kelly

Descendant of Ceallach

Clan or community name

Kelly (Ó Ceallaigh) means 'descendant of Ceallach', a personal name that may mean 'bright-headed' or 'frequenter of churches'. Multiple distinct septs bore the name, the most important being the O’Kellys of Uí Maine in east Galway and the O’Kellys of Breifne.

Kelly is one of the most common Irish surnames and is found throughout Ireland and the diaspora. The name was often anglicized without the 'O' prefix. In some cases Kelly may also derive from the Scottish Gaelic Mac Ceallaigh.

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Frequently asked questions

What does the surname Kelly mean?+

Descendant of Ceallach. Ceallach is an old Irish given name whose root meaning is debated, variously glossed as "bright-headed" or related to strife/war.

Is Kelly a common surname?+

Kelly is a Irish-origin surname. Popularity varies widely by country and region, and the same surname can be common in one place and rare in another.

Can two families with the same surname be unrelated?+

Yes. Surnames, especially occupational and descriptive ones like this, were often adopted independently by many unrelated families who happened to share a trade, appearance, or location.

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