The Lordship of Coshmaing (also spelled variously as "Cosmaigne," "Coshmang," "Cois Mainge," etc.) was created in the 14th century when the King of Desmond, Cormac MacCarthy Mór (d.
Butler described the inception of Coshmaing thusly: "..Eoghan was given the lordship of Coshmaing.