Estate: Mahon (Killalaghtan)

Associated Families

• Mahon (Killalaghtan)

Description

In the 1870s John Mahon of Ballydonnellan is recorded as the owner of almost 1300 acres in county Galway. His father was the Very Reverend James Mahon, Dean of Dromore, younger brother of Sir Ross Mahon of Castlegar. John Mahon married Harriet Dillon of Johnstown, county Roscommon. His son married into the Persse of Roxborough family.

Houses

House Name / Description	Townland	Civil Parish	PLU	DED	Barony	County	Map Ref
Ballydonnellan Castle (H807) At the time of Griffith's Valuation, Ballydonnellan Castle was occupied by John D. Mahon and was valued at £62. It was still extant in the 1890s but is described as "in ruins" on the 1933 edition of 6" map. These ruins are still visible.	Ballydonnellan East	Killalaghtan	Ballinasloe	Killoran 13	Kilconnell	Galway	Lat/Lon: 53.25036 -8.41503 OSI Ref: M723223 Discovery map #47. OS Sheet #98.

Archival sources

Contemporary printed sources

Many of these resources are now available online. For a list with Web links please see the Online Printed Sources Links

• GRIFFITH'S VALUATION OF IRELAND'[Primary Valuation of Tenements]', 1850-1858. : Ballinasloe Union, 86.
• 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] : 302.
• PARLIAMENTARY PAPERS. Return of owners of land of one acre and upwards, in the several counties .... in Ireland. HC 1876, LXXX: 298.

Modern printed sources

• BURKE, Sir Bernard. A genealogical and heraldic history of the Landed Gentry of Ireland. London: Harrison & Sons, 1904: 379-380
• BURKE, Sir Bernard. A genealogical and heraldic history of the Landed Gentry of Ireland. London: Harrison & Sons, 1912: 452.
• WALFORD, Edward. County Families of the United Kingdom. London: Chatto & Windus, 1888: 698