Coyne ~ Ó Cadhain

The Story of the Coyne Name

Coyne is the anglicized form of the Irish Ó Cadhain, meaning “descendant of Cadhan.” The personal name Cadhan comes from the Irish word cadhan, meaning “wild goose” or “barnacle goose.” The surname belongs to an ancient Gaelic family of Connacht, with particularly strong associations with County Mayo and County Galway.

The O’Cadhains were traditionally associated with Partry in County Mayo, where the family formed part of the wider Uí Fiachrach tradition of western Connacht. Over time, branches of the family became established across the Galway-Mayo region, including Connemara, where the Irish language and Gaelic traditions remained particularly strong. The landscape of western Connacht—its lakes, mountains, islands, and Atlantic coastline—became the enduring setting for the name.

As the Irish language gave way to English in official records, Ó Cadhain developed into several anglicized forms, including Coyne, Kyne, and O’Kyne. The surname remains especially associated with Galway and Mayo, and historical records show the name deeply established in communities throughout western Connacht. The Irish-language form has also survived remarkably well, particularly in the Gaeltacht areas of Galway.

Behind the familiar name Coyne lies the story of an ancient Connacht family whose name carries the image of the wild goose. From the shores and countryside of Mayo and Galway, Ó Cadhain became Coyne, carrying forward a name rooted in the Irish language and in the distinctive landscape of western Ireland. For those who bear the name today, it offers a connection to one of the most enduring Gaelic regions of the country.