| Original form | Le Poer (Norman French) / de Paor (Irish Gaelic adaptation) |
| Meaning | From Norman French le povre or le poer — "the poor one" (a common Norman byname, often ironic or humble in origin) |
| Principal counties | Waterford, Kilkenny, Wexford, Tipperary, Cork |
| Origin | Norman — arrived in Ireland with the Anglo-Norman invasion, 1169–1172 |
| Frequency | Among Ireland's top 20 surnames — approximately 25,000 in Ireland today |
| Common variants | Power, Powers, Poer, de Paor, Le Poer |
Power is one of Ireland's most common surnames but, unlike most Irish surnames, it is not Gaelic in origin. The Powers are a Norman family, descended from the knights and soldiers who crossed to Ireland with Strongbow (Richard de Clare) and the Anglo-Norman invasion of 1169–1172. They arrived as conquerors, became Irish, and gave their Norman name to a family that would become one of the most powerful dynasties in Munster.
The name derives from the Norman French le poer or le povre, meaning "the poor one." This was a common type of Norman byname — a humble or ironic epithet that became attached to a family and then hardened into a hereditary surname. The Normans had a habit of such bynames: Le Fort (the strong), Le Brun (the brown), Le Poer (the poor). These were personal identifiers in the first generation that became family names for all generations following.
In Ireland, the Norman name was quickly adapted. The Gaelic form is de Paor — a phonetic rendering of "le poer" through the Irish sound system. This Gaelicised form is used today in official Irish-language contexts and by families who prefer the Gaelic spelling. Both Power and de Paor are the same name, the same family, seen through different linguistic traditions.
The Power name is overwhelmingly concentrated in the southeast of Ireland — the Munster province and the adjacent parts of Leinster that were the core territory of the original Anglo-Norman settlement. This is not coincidental: it reflects where the Powers came and where they stayed.
Waterford is the Power family's ancestral home. The Anglo-Norman Powers received extensive land grants in County Waterford following the invasion, and they held and built on those grants for centuries. The city of Waterford — an existing Viking settlement — was one of the primary entry points of the Norman invasion, and the surrounding county was quickly settled by Norman families of whom the Powers were among the most prominent. Waterford remained Power country through the medieval period and into the modern era: the county has one of the highest concentrations of the Power surname in Ireland today.
County Kilkenny and County Wexford also have significant Power populations, again reflecting the original pattern of Norman settlement in the southeast. The medieval Pale — the area of secure Anglo-Norman control — encompassed much of Leinster, and the Powers were part of the aristocratic layer of that settled territory.
The Powers arrived in Ireland in the early 1170s with the first wave of Anglo-Norman knights. The original settler, Robert le Poer, received grants of land in County Waterford and established the family's base in that county. Over the following generations, the family expanded its landholdings through military service, strategic marriage, and the general process by which successful Norman families accumulated property in conquered territory.
By the thirteenth century, the Powers were established as one of the great Anglo-Norman families of Munster — comparable in local importance to the Butlers of Kilkenny and the Fitzgeralds of Kildare among the great magnate families that shaped medieval Ireland's political landscape.
The Power family built extensively across County Waterford. Their castles, many of them now ruined, dot the Waterford countryside — evidence of a family that controlled territory through military infrastructure. Several Power castles survive in various states of preservation: Faithlegg Castle, Mothel Castle, and Ballymacaw are among the sites associated with the medieval Power lordship.
Like other great Anglo-Norman families, the Powers navigated the complex politics of medieval Ireland — maintaining loyalty to the English Crown when politically advantageous, making accommodations with Gaelic neighbours when necessary, and generally prioritising the survival and growth of the family's interests above ideological consistency.
The Powers remained Catholic through the Reformation — as did most of the Old English families of the southeast — and this alignment with Rome rather than the reformed Church of Ireland cost them dearly in the seventeenth century. During the Wars of the Three Kingdoms (1640s), the Powers were among the Old English and Gaelic Catholic families who joined the Confederate Ireland movement, attempting to defend Catholic interests in a period of radical political instability.
The Cromwellian conquest of the 1650s was catastrophic for Catholic landholding families. Power estates in Waterford were confiscated and redistributed to Protestant settlers, as happened across much of the country. Many Power families descended from landed gentry to tenant farmers in a single generation — the typical story of the post-Cromwellian Catholic gentry.
Power families emigrated from the southeast of Ireland in large numbers from the eighteenth century onward, with the greatest waves coming during and after the Great Famine (1845–1852). Waterford and Kilkenny were among the most severely affected counties.
In the United States, Power/Powers families are found across the eastern seaboard, with concentrations in cities with strong Waterford and southeast Irish connections — New York, Philadelphia, and Boston prominent among them. The name is common enough in America that it can be difficult to trace without a county of origin.
Australia received many Irish emigrants from Waterford and Munster, particularly through the assisted emigration schemes of the 1830s–1860s. Victoria and New South Wales have significant Power populations. The Irish actor and film star Tyrone Power (1914–1958), one of Hollywood's great leading men of the 1930s and 40s, was of Irish Power descent — his family from County Waterford.
In American records, the name often appears as "Powers" — a common anglicisation pattern adding an "s" to Irish surnames. Both Power and Powers in American records likely represent the same Irish family.
If your family tradition indicates Waterford or southeast Ireland, begin with Waterford county records. IrishGenealogy.ie holds Catholic parish registers and civil registration records searchable by name and county.
The Griffith's Valuation (1847–1864) shows Power as overwhelmingly concentrated in Waterford, Kilkenny, and Wexford — confirming the southeast origin pattern. Searching for Power in your county of interest will identify the specific townlands most associated with the name.
For those tracing Power lines back to the medieval period, the Calendar of State Papers Ireland and the various collections of Anglo-Norman documents at the National Archives of Ireland and the Public Record Office in London contain references to the Power family from the thirteenth century onward — unusually deep records for an Irish family, a consequence of their Anglo-Norman origins and their position within the literate administrative culture of medieval Anglo-Ireland.
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