Landed Estates
NUI Galway

Dillon (Mount Dillon)

John Dillon was transplanted from county Westmeath to county Roscommon in the 17th century. His descendants built Mount Dillon sometime early in the 18th century. John and Teresa Dillon were living at Mount Dillon at the time of the Elphin Census in 1748. Theobald Dillon of Mount Dillon was a member of the Grand Panel of county Roscommon in 1828. At the time of Griffith's Valuation the Dillon estate was in the parish of Lissonuffy, barony and county of Roscommon. It amounted to over 4,000 acres in the parish when it was advertised for sale in June 1865. Marcella Dillon was a proprietor in the parish of Killukin, barony of Roscommon in the mid 1850s. Marcella, only child of Sir Thomas Barnewall, 6th baronet, married as her second husband Theobald Dillon of Mount Dillon. John Theobald Dillon was advertising the sale of the fee farm rent of the lands of Ballagh, parish of Kilgefin, barony of Ballintober South, in November 1863. In the 1870s John Theobald Dillon of Killeshandra, county Cavan and Mount Dillon owned an estate of 5,588 acres in county Roscommon. He advertised other property for sale in the Land Judges' court in December 1888.


Name Townland Civil Parish PLU DED Barony County Map Ref
Mount Dillon Mountdillon Lissonuffy Strokestown Lissonuffy 103 Roscommon Roscommon OSI Ref: M999752
OS Sheet: 30
Discovery map: 40
Ballagh Ballagh Kilgefin Roscommon Drumdaff 82 Ballintober South Roscommon OSI Ref: M949 703
OS Sheet: 36
Discovery map: 40
Cloonmurray Cloonmurray Killurkin Strokestown Killukin 110 Roscommon Roscommon OSI Ref: M869 781
OS Sheet: 28
Discovery map: 40
Curraghroe Curraghroe Lissonuffy Strokestown Lissonuffy 103 Roscommon Roscommon OSI Ref: M982747
OS Sheet: 29
Discovery map: 40

Archival sources

  • Landed Estates’ Court Rentals (O’Brien), Dillon, 19 Nov 1863, Vol 70, MRGS 39/035, (microfilm copy in NUIG); National Archives of Ireland
  • Landed Estates’ Court Rentals (O’Brien), Dillon, 1 June 1865, Vol 77, MRGS 39/038, (microfilm copy in NUIG); National Archives of Ireland
  • Pedigree of Dillon of Mount Dillon & Townsville, Australia, c 1700-1951. GO MS 182a: 67-68; National Library of Ireland

Contemporary printed sources

Modern printed sources

  • ''The Irish Genealogist'': DILLON, Gerald. Cnoc Diolun. A genealogical survey of the Dillon family in Ireland. II No.12 (July 1955), 361-367