Cahill — Irish Surname Origin & Meaning
Irish form: O Cathail
Meaning: 'descendant of Cathal, meaning mighty in battle'
Traditional stronghold: Clare, Tipperary
Pronunciation: KAY-hil; Irish O Cathail: oh KA-hil
History of the Cahill name
O Cathail, from the personal name Cathal ('strong in battle'), named a sept centred in County Clare and adjoining parts of Tipperary and Galway, part of the wider Dalcassian grouping connected to the O'Briens. The family did not rise to major ruling status but persisted steadily as a landholding sept through the medieval period in its home territory. The O prefix fell away in general usage by the 19th century, leaving the simple form Cahill, which remains especially concentrated in Clare and the mid-west of Ireland. Like many Munster names, it spread widely through 19th-century emigration to Britain, the United States and Australia, where it remains a recognisably Irish surname today.
Variants: O'Cahill · Cahil · Kehill
Famous bearers of the name
- Thaddeus Cahill — American inventor of the telharmonium, an early electronic instrument, of Irish descent
- Kevin Cahill — Irish-American doctor and humanitarian
- Mabel Cahill — 19th-century Irish tennis champion who won multiple US titles
- Joe Cahill — Irish republican leader and IRA chief of staff
Related names from the same part of Ireland: O'Brien · Ryan · Kennedy · Quinn · McDonnell · McMahon · Carroll · Boland