From Mag Oireachtaigh, ‘son of Oireachtach’ — a Roscommon family whose name comes straight from the Irish word for an assembly.
The Geraghty certificate.
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Gaelic Origin · Root name Oireachtach, from oireacht, ‘assembly’
Geraghty anglicises Mag Oireachtaigh, ‘son of Oireachtach’, a personal name built directly on oireacht, the Irish word for a gathering or assembly — the same root that gives the modern Oireachtas its name. The family held territory in County Roscommon, closely linked to the Costello and McDonagh septs of the same region.
Not many surnames spell out the very word for parliament in their own root — Geraghty does.
Irish form: Mag Oireachtaigh
