Caulfield is a surname of several separate origins.
[1] It may occasionally be of English origin,[2] but in Ireland is often a simplified form of a number of Gaelic surnames, including Mac Cathmhaoil,[3] an Ulster family traditionally descended from Niall of the Nine Hostages.
[4] It is also known to be an anglicized form of Ó Gamhna, Ó Gamhnáin and “Mac Congamhna”.
A variant Caulfeild, were an Anglo-Irish family (see Earl of Charlemont).
Notable people with this surname include: