Killough

Killough is a locational surname of Irish origin. It indicates a person who originated from a place called Killough, the best known being the village of Killough (Irish Cill Locha, "church of the loch") on the coast of County Down, Northern Ireland. An additional place called Killough exists in County Wicklow, Ireland.

Etymology

The surname literally means "church on the lake", derived from the Irish cill ("church") and loch ("lake"). The name's root cill is a common element in Irish place names, often anglicised as "kill". The specific location Killough in County Down appears in the Down Survey of the 17th century as 'Kiltaghlins'. Saint Anne's Porthole is also noted as an early variant of the place name.

History and the Ward family

The history of the surname Killough is closely tied to the development of the village of Killough in the 18th century. According to historical records, the harbour at Killough was built by the Wards of the nearby Castle Ward estate. In 1740, Michael Ward had a straight road built from Castle Ward to the village, which he initially renamed Port St Anne — a name that did not take hold, though the area was also called St Anne's Port. The connection between the surname and this specific development suggests that some bearers of the name Killough may descend from residents drawn to the area during this period of expansion.

Notable Bearers

Among notable individuals with the surname Killough is Muriel Killough, a recognised figure in the arts or community. The 2001 census records the village of Killough itself as having a population of 845, so while the surname is not common globally, it remains concentrated in its ancestral region.

Key Facts

• Meaning: "Church on the lake" (from Irish cill and loch)
• Origin: Irish locational surname
• Type: Surname
• Usage regions: Northern Ireland (particularly County Down) and Republic of Ireland