Keane
An Irish surname that usually comes from Gaelic names meaning either “descendant of Cian” or a form of the word for “sharp” or “keen.”
The #3,154 most common surname in the United States (2010 Census) — about 1 in every 26,943 Americans shares it.
Etymology
Keane is an Anglicized Irish surname with more than one likely source. In Irish it is commonly linked to Ó Catháin or Ó Cianáin in some traditions, but the form Keane is often explained from Gaelic personal names such as Cian, meaning “ancient” or “enduring,” or from words associated with being keen, sharp, or alert. English records also show it as a variant of Keen/Keene, which could arise independently as a nickname surname with the same “sharp, eager” sense.
History
The name is found widely in Ireland, especially in Anglicized forms used in English-language records from the 16th century onward. Historical surname collections frequently group Keane with Keen, Keene, and Kane, reflecting both Irish and English lines of development. In modern usage, Keane is strongly associated with Ireland but is also established in Britain, North America, and the Irish diaspora.
Origin
Regions
Variant spellings
Fun fact
Bardsley notes Keane alongside Kean, Keen, and Keene, showing how easily medieval spellings could shift between related forms.
From the historical record
“. . Johd Cawood and A^ca Keane : MarriajiT Lie. (LondonX !. 4t. 1771, Mairied— William Can-ood and Mary Jonel : St. G«l Han. Sq. 1. »06.”
— A Dictionary of English and Welsh Surnames, with special American instances