O'Sullivan
also Sullivan, Ó Súilleabháin
The third most common Irish surname — and the family of Donal Cam's march.
CoreHistoric reach
The seat of O'Sullivan
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No mission proclaimed. The chief, once seated, sets the clan’s public focus — a campaign, a contest, a piece of restoration, a year of remembrance.
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Lámh Foistineach an Uachtar
— The gentle hand uppermost
What does the O'Sullivan name mean?
From Ó Súilleabháin — descendant of Súilleabhán. The personal name Súilleabhán is most often glossed as 'one-eyed' or 'hawk-eyed' (súil, eye + dubhán, dark, or súil + amháin, single), though the etymology is contested. The eponymous Súilleabhán was a 10th-century chief of the Eóganacht Cnoc Raffan, a Munster sept seated in modern Tipperary. Pushed south and west by the Anglo-Norman conquest of the 1170s, the family re-established itself across the Beara and Iveragh peninsulas of west Cork and south Kerry, where it has held ground ever since.
The history of O'Sullivan
O'Sullivan is the third most common surname in Ireland, after Murphy and Kelly, and the most heavily concentrated in the south-west. Two principal Munster lines descend from the move out of Tipperary: O'Sullivan Mór, with its seat at Dunkerron in south Kerry, and O'Sullivan Beare, lords of the Beara peninsula and the harbour at Berehaven. Both lines kept their lordship into the early seventeenth century and both lost it in the Tudor and Williamite confiscations. The surname survived the loss of the title.
Donal Cam O'Sullivan Beare (1561–1618) is the central figure — chief of the Beara line, the last Gaelic lord to hold the south-west against Elizabeth's armies, and the protagonist of the great winter march of 1602–1603 that ended at Leitrim with thirty-five survivors out of a thousand. Philip O'Sullivan Beare (c.1590–1660), his nephew, wrote the Historiae Catholicae Iberniae Compendium in Spanish exile — one of the foundational accounts of the Tudor wars in Ireland from the Gaelic side. Maureen O'Sullivan (1911–1998), the Boyle-born actress who played Jane in the 1930s Tarzan films, is the family's most internationally famous twentieth-century bearer; her daughter Mia Farrow extends the line into a third generation of public life.
Notable bearers of the O'Sullivan name
- Donal Cam O'Sullivan Beare (1561–1618) — last Gaelic lord of Beara, leader of the 1603 march
- Philip O'Sullivan Beare (c.1590–1660) — historian of Catholic Ireland in Spanish exile
- Maureen O'Sullivan (1911–1998) — actress
- John L. Sullivan (1858–1918) — Boston-Irish, world heavyweight boxing champion