Landed Estates
NUI Galway

Costello (Edmondstown)

The Costellos were settled at Castlemore, parish of Castlemore, barony of Costello, county Mayo, from at least the early 16th century. Castlemore continued to be their residence until the late 18th century but by the early 19th century the main family residence was at Edmondstown. Most of the Costello estate was in the parishes of Aghamore and Kilcolman, including one townland in the barony of Frenchpark. In 1862 Arthur Robert Costello, son of Charles, advertised for sale in the Landed Estates' Court about 1100 acres in the baronies of Gallen and Costello, county Mayo and about 1050 acres in the parish of St Johns, barony of Athlone, county Roscommon. Some of these lots were purchased in trust by Messers. McNevin and Burke. In the 1870s however he still owned 7513 acres in county Mayo and 1038 acres in county Roscommon. In July 1876 lands belonging to Charles Costello in counties Roscommon, Longford and Westmeath were offered for sale in the Landed Estates Court. Over 700 acres at Carrowmorragh, county Roscommon was purchased by P.F. Leonard. The Costello estate at Edmondstown was sold to the tenants in the 1880s and the house to the Bishop of Achonry. In 1878 Charles Costello of Kilfree, Gurteen, county Sligo owned 174 acres in county Mayo and 1330 acres in county Sligo. Most of this property was in the barony of Coolavin. After 1909 an offer was accepted by J.P. Costello on over 180 acres of his estate in county Sligo.


Name Townland Civil Parish PLU DED Barony County Map Ref
Edmondstown Tullaghanmore or Edmondstown Demesne Kilcolman Castlereagh Edmondstown 58 Costello Mayo OSI Ref: M643 968
OS Sheet: 74
Discovery map: 32
Castlemore Castlemore Castlemore Castlereagh Ballaghaderreen 57 Costello Mayo OSI Ref: M598 948
OS Sheet: 74
Discovery map: 32
Kilfree Kilfree Kilfree Boyle Kilfree 11 Coolavin Sligo OSI Ref: G645029
OS Sheet: 44
Discovery map: 32

Archival sources

  • Pedigree of Costello of Bealahaunish, Castlemore, Edmonstown and Tolloghan, Co Mayo, with descent from Nangle and de Angulo, 1172-1856. GO MS 178, 198-205 & 496; National Library of Ireland
  • Landed Estates' Court Rentals (O'Brien), Costello, 8 July 1862, Vol 66, MRGS 39/033, (microfilm copy in NUIG); National Archives of Ireland
  • Edmondstown photos. 013/056; Irish Architectural Archive
  • Solicitors' Papers, legal papers re sales rental of lands in Co Galway to be sold in Landed Estates' Court 1860 by Langley and Costello. Small Accs. Index 47, Courts 2070 & 2C 47 32 ; National Archives of Ireland

Contemporary printed sources

Modern printed sources