From the Irish county name Ciarraí, derived from 'Ciar' meaning dark or black-haired.
Kerry originates as a place name from the southwest of Ireland, County Kerry — "Ciarraí" in Irish, meaning "the people of Ciar," Ciar being a personal name derived from the Old Irish "ciar" (dark, black). County Kerry, with its dramatic Atlantic coastline, the Ring of Kerry, and the mountains of the Iveragh Peninsula, is one of Ireland's most recognizable landscapes, and the name carries that wild, windswept geography within it. The county itself was named for a legendary prince, Ciar, said to be a son of the mythological figure Fergus mac Róich.
As a personal name, Kerry crossed from geography into the nursery in the mid-20th century, used in Ireland, Britain, Australia, and the United States for both boys and girls — though it gradually skewed feminine in most English-speaking countries. Its peak popularity in the 1970s and 1980s coincided with a broader fashion for Irish place names as given names, a trend reflecting both diaspora pride and a general appetite for names that sounded melodic without being obviously foreign. Notable Kerrys include American politician and diplomat John Kerry, Australian actress Kerry Armstrong, and British television presenter Kerry Katona.
Today Kerry feels warmly retro — recognizable but no longer at the height of fashion, which gives modern bearers a slightly vintage individuality. It is a name of easy friendliness and genuine geographic poetry, one that doesn't demand explanation but rewards those who trace it back to its misty Irish headlands and the dark-haired prince who once gave them his name.