Gortnacleigh (Irish derived place name, either Gort na Cléithe meaning 'The Field of the Palisade’ or Gort na Cloiche meaning 'The Field of the Stone'.
[2] Until the 1650s, Gortnacleigh formed part of the modern townland of Cloncose and its history is the same up till then.
From medieval times up to the early 1600s, the land belonged to the McKiernan Clan.
An Inquisition held at Cavan on 10 June 1629 stated that the poll of Cloncose, belonging to Sir Alexander Hamilton, contained four sub-divisions named Gortnekillefohin, Knockanvisfuit, Gartinnecassaghe and Moneshein.
It also described the boundary of the townland as- bounding upon Drumnoass on the north, meared thorow a greate boge to Ballina and Garticloyche, and from thence meered by a running brooke or streame to Knocknehorna.