Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
CUSACK
There are approximately 2,970 people named Cusack in the UK. That makes it the 3,299th most common surname overall. Out of every million people in the UK, approximately 47 are named Cusack.
Region of origin
British Isles
Country of origin
Ireland
Language of origin
Gaelic
Religion of origin
Christian
Classification
Celtic
Related and similar surnames
CusacCusaac
Cusa
Cuisack
Cusaack
Cusacke
Cusacks
Cousack
Cuissack
Cusaek
Cuisac
Cusaic
Cusak
Coussack
Cuiseck
Cowsack
Cousac
Cuisseck
Cousak
Cusact
Coussac
Cusackey
Cuisek
The Cusack surname in historical dictionaries
Patronymica Britannica (1860)
CUSACK. There are two distinct origins assigned to this name. On one side it is asserted that the family spring from an illustrious race, the Sieurs de Cusac of Guienne in the IX. cent.; and on the other tliat they are of ancient Irish extraction, from Isog, foimder of the Clan Isog or Clan Cusack, and eleventh in descent from Olioll Olium, king of Mimster in 234. B.L.G.