Surname
Ó Cathasaigh
“vigilant; noisy”
Ó Cathasaigh is a surname from Old Irish. It is used in Irish.
Meaning & origin
What it means
Ó Cathasaigh goes back to Old Irish cathaisech, meaning “vigilant; noisy.”
Adapted from Wiktionary (CC BY-SA 4.0)
How it developed
From Old Irish cathaisech (“vigilant; noisy”).
Adapted from Wiktionary (CC BY-SA 4.0)
Ó Cathasaigh’s family of names
The ring: across languages.
Hover or tab through the constellation to see how each name is related. Bigger dots are names more people in the U.S. share.
Across languages 1
Equivalents and cognates in other languages, plus older forms it grew from.
Similar names
If you love Ó Cathasaigh, these share its style, era, origin or sound, from outside its own family.
Ó Brádaigh
Ó Brádaigh is a surname. It is used in Irish.
—
Ó Cathaláin
“strong in battle”
—
O'Callaghan
O'Callaghan is a surname from Irish.
—
O'Flaherty
O'Flaherty is a surname from Irish.
—
O'leary
O'Leary is a surname from Irish.
—
O'Doherty
“descendant of Dochartach”
—
O'Reagan
“of Riagán”
—
O'Halleran
“descendant of Allmhurán”
—