Holywell is a small village near Belcoo in County Fermanagh, Northern Ireland. It is within the townlands of Cavancarragh and Rushin.Ordnance Survey Ireland: Online map viewer (choose "historic" to see townland boundaries) It had a population (with Belcoo) of 439 in the 2021 census. It is part of the Fermanagh and Omagh area.
See also List of towns and villages in Northern Ireland
References
Fermanagh Gold Culture Northern Ireland Holy Well page of Clogher Historical Society/Cumann Seanchais Chlochair website - includes current pilgrimage and contact details