John P. Geoghegan is recorded as one of the principal lessors in the parishes of Killoran and Kiltormer, barony of Longford, county Galway at the time of Griffith's Valuation. He appears to be descended from a Westmeath family who were dispossessed during the Cromwellian period. In the 1870s, John Geoghegan, resident at Dartfield, Loughrea, owned over 1500 acres in county Galway. O'Gorman notes that he was also in possession of lands in the parish of Foenagh for which Thomas Blackstock acted as his agent.
Contemporary printed sources
- HUSSEY DE BURGH, U. H. ''The Landowners of Ireland. An alphabetical list of the owners of estates of 500 acres or £500 valuation and upwards in Ireland''. Dublin: Hodges, Foster and Figgis, 1878. [available online at www.askaboutireland.ie] : 179.
- PARLIAMENTARY PAPERS. ''Return of owners of land of one acre and upwards, in the several counties .... in Ireland''. HC 1876, LXXX: 295
- PARLIAMENTARY PAPERS. ''Return of names of proprietors and area and valuation of properties in counties in Ireland, held in fee or perpetuity or long leases at chief rents,'' 1876. (412) LXXX. 395: 151.