Connolly ~ Ó Conghaile / Ó Conghalaigh

The Story of the Connolly Name

Connolly is an anglicized form of several related Irish surnames, most notably Ó Conghaile and Ó Conghalaigh, meaning “descendant of Conghal” or “descendant of Conghalach.” The personal name Conghal is traditionally connected with the ideas of a hound and valor, giving the name the striking interpretation of “hound of valor.”

Several distinct Connolly families arose in Ireland, with important branches associated with County Galway and County Monaghan. The Connacht Ó Conghaile were an ancient family of the region, while another important branch became established in Monaghan and the surrounding Ulster borderlands. There were also separate families in other parts of Ireland whose Irish names eventually became Connolly in English.

One branch of the family became particularly prominent in County Monaghan, where the Connollys served as an important Gaelic family under the MacMahon dynasty. Another branch was associated with Galway, reflecting the wider distribution of the name across Ireland. Because several unrelated families bore the name, Connolly does not point to one single ancestral line.

Behind the familiar name Connolly lies the story of several Gaelic families, different places, and an ancient personal name associated with courage and strength. From Galway to Monaghan and beyond, Ó Conghaile and Ó Conghalaigh preserve the memory of the families who carried these names through generations of Irish history.