Doody is the standard anglicisation of Ó Dubhda in Munster, particularly in County Kerry. MacLysaght’s Irish Families records Doody as the Munster form of the name. It is well-attested in Kerry parish registers from the 17th century onward.

The relationship between the Munster Doody and the main Connacht Ó Dubhda sept is discussed in Mac Hale’s O’Dubhda Family History (1990). Unlike the Connacht line — which has a full medieval pedigree preserved in Mac Firbis — the origin of the Kerry Doody families has not been reconstructed to the same standard, and the question of whether they represent a cadet branch of the Connacht sept, a separate family bearing the same Gaelic name, or some combination of both is not settled in the published literature.

Conor Mac Hale, in The O’Dubhda Family History (1990), preserves one specific clan tradition for the origin of the Kerry Doody families. He records that Tadhg Buí Ó Dubhda — the last O’Dubhda Taoiseach of Tír Fhiachrach, inaugurated under Brehon custom in 1595 after the killing of his brother David “by a soldier of the queen” at Castleconor — took an active part in the Nine Years’ War and led his warriors on the famous march with Red Hugh O’Donnell south to the Battle of Kinsale in 1601. After the defeat there, according to Mac Hale, Tadhg Buí is said to have “settled in Kerry — where his family became known as Doody.” If that tradition is reliable, the Kerry Doody line would descend directly from the last ruling O’Dubhda Taoiseach.

The tradition is not supported by a continuous Kerry pedigree of the kind Mac Firbis preserved for the Connacht senior line, and Mac Hale himself presents it with the hedged phrasing “is said to”. It is, in short, a living family memory rather than a documented genealogical record. We include it here because it is the single most specific origin story offered in the published literature for the Kerry Doody, and because — whatever its historical footing — it is consistent with the broader pattern of displaced Gaelic lords scattering south and west after Kinsale and the collapse of the Nine Years’ War.

Griffith’s Valuation (1848–64) shows Doody concentrated in the parishes of County Kerry, with smaller numbers in adjoining parts of Cork, Clare, and Limerick. The 1901 and 1911 censuses confirm the same pattern of a predominantly Kerry-based distribution.

The variant Duddy also occurs in Kerry as a minority anglicisation of the same family.

A prefix-preserving form, O’Doody, appears in 17th-century Kerry parish records and in Fiants-era legal documents as the direct anglicisation of Ó Dubhda in its Munster pronunciation. Like many Gaelic surnames, the O’ was widely dropped during the 18th and 19th centuries, and Doody is the form in general use today. An O’Doody family is a Doody family in every meaningful sense — the same Munster sept with the prefix retained.