Cusack Family History
Cusack Name Meaning
Irish (of Norman origin): habitational name from Cussac in Guienne France named with the Gallo-Roman personal name Cūcius or Cussius + the locative suffix -acum. The surname died out in England but is common in Ireland where it was imported at the time of the Anglo-Norman invasion in the 12th century. It has been Gaelicized as de Cíosóg.
Source: Dictionary of American Family Names 2nd edition, 2022