The Anglicisation of Irish Surnames

1465 - 1900s — How Gaelic surnames were 'Englished' under British rule — by law, by clerks, and by centuries of pressure — turning names like Mac Gabhann into Smith.

For centuries the government in Ireland treated names as a battleground of identity. As early as the Statutes of Kilkenny (1366), the Crown tried to stop its own Anglo-Norman colonists from 'going native' by taking Irish names, speaking Irish or following Gaelic law. As English power grew, that same anxiety was turned on the native Irish themselves — and their Gaelic surnames, among the oldest hereditary surnames in Europe, came under steady pressure to be 'Englished'.

The bluntest measure came in 1465, when a statute of Edward IV ordered every Irishman living within the Pale — the counties of Dublin, Meath, Louth and Kildare — to abandon his Gaelic name and take an English one instead: from a town (Sutton, Chester, Cork, Kinsale), a colour (White, Black, Brown), a trade (Smith, Carpenter) or a household office (Cook, Butler). Refuse, and he forfeited his goods. The same law told him to dress in the English style, shave his upper lip and swear allegiance to the king. A great many Irish Smiths, Whites, Cooks and Butlers descend directly from this order.

Under the Tudors the pressure grew heavier. The distinctively Gaelic prefixes Ó ('descendant of') and Mac ('son of') were suppressed, at times by martial law, as part of enforcing what officials called 'English civility'. Through the policy of 'surrender and regrant', Gaelic chieftains handed their lands to the Crown and received them back with English titles — so Ó Néill became the Earl of Tyrone — anglicising the very leaders of Gaelic society.

Most surnames, though, were changed not by decree but by paperwork. As English-speaking administration, courts, taxes and plantation surveys spread across the country in the 1500s and 1600s, Gaelic names had to be written down by clerks who spoke little or no Irish. They did one of two things — translated the name's meaning, or spelled out its sound. So Mac Gabhann, 'son of the smith', became Smith when translated (especially in County Cavan) and McGowan when written phonetically: two English surnames hiding a single Gaelic original. Countless names were reshaped the same way — Breathnach ('the Briton') to Walsh, Mac an Bhreithimh ('son of the judge') to Judge, Ó Draighneáin (from the blackthorn) to Thornton.

The scholar John O'Donovan, who standardised thousands of Irish names for the Ordnance Survey, judged that the main engine of change was contempt — 'the ridicule thrown upon [Gaelic names] by English magistrates and lawyers who were ignorant of the Irish language'. From the 1830s the new English-only National Schools, and from 1864 the civil registration of every birth, marriage and death, fixed these anglicised spellings in official ink for good.

Through the Penal era the Ó and Mac prefixes fell away almost entirely: a conspicuously Gaelic name was a liability, and a bare surname seemed modern and respectable, so Ó Súilleabháin became Sullivan and Ó Ceallaigh became Kelly. The Great Famine and the mass emigration that followed — overwhelmingly to English-speaking countries — spread the anglicised forms across the world among the millions of the diaspora.

The tide only turned with the Gaelic Revival. In 1892 Douglas Hyde called for 'the de-Anglicising of the Irish nation', and the Gaelic League he helped found urged people to reclaim the Irish forms of their names — restoring the Ó and Mac, and the women's forms Ní ('daughter of') and Nic. It is why a single bloodline can today carry Sullivan and O'Sullivan, or Smith, Gowan and McGowan: the visible scars, and the slow healing, of centuries of pressure on something as personal as a family's name.