Pronunciation
Kah-a-see / Kah-a-sa / Kah-a-sig
These spellings are a guide to the sound. Irish pronunciation can vary by dialect.
Meaning
Vigilant, watchful
Alternate spellings
Casey
Fun fact
Casey is an anglicised form linked with Cathasaigh. A familiar-looking name can lead back to a much longer Irish surname.
Popularity in Ireland
Figures for the spelling Cathasaigh, Republic of Ireland.
The CSO only publishes names given to three or more babies in a year. “Less than 3” means zero, one or two babies, and these years appear as gaps on the graph.
Number of babies registered each year
Less than 3 babies were registered with this spelling in each of these years.
From 2018, spellings with and without fadas are counted separately. Earlier figures group these spellings together, so the graph has a break at 2018.
View yearly figures
| Year | Babies named | Rank |
|---|---|---|
| 2025 | Less than 3 | - |
| 2024 | Less than 3 | - |
| 2023 | Less than 3 | - |
| 2022 | Less than 3 | - |
| 2021 | Less than 3 | - |
| 2020 | Less than 3 | - |
| 2019 | Less than 3 | - |
| 2018 | Less than 3 | - |
| 2017 | Less than 3 | - |
| 2016 | Less than 3 | - |
| 2015 | Less than 3 | - |
| 2014 | Less than 3 | - |
| 2013 | Less than 3 | - |
| 2012 | Less than 3 | - |
| 2011 | Less than 3 | - |
| 2010 | Less than 3 | - |
| 2009 | Less than 3 | - |
| 2008 | Less than 3 | - |
| 2007 | Less than 3 | - |
| 2006 | Less than 3 | - |
| 2005 | Less than 3 | - |
| 2004 | Less than 3 | - |
| 2003 | Less than 3 | - |
| 2002 | Less than 3 | - |
| 2001 | Less than 3 | - |
| 2000 | Less than 3 | - |
| 1999 | Less than 3 | - |
| 1998 | Less than 3 | - |
| 1997 | Less than 3 | - |
| 1996 | Less than 3 | - |
| 1995 | Less than 3 | - |
| 1994 | Less than 3 | - |
| 1993 | Less than 3 | - |
| 1992 | Less than 3 | - |
| 1991 | Less than 3 | - |
| 1990 | Less than 3 | - |
| 1989 | Less than 3 | - |
| 1988 | Less than 3 | - |
| 1987 | Less than 3 | - |
| 1986 | Less than 3 | - |
| 1985 | Less than 3 | - |
| 1984 | Less than 3 | - |
| 1983 | Less than 3 | - |
| 1982 | Less than 3 | - |
| 1981 | Less than 3 | - |
| 1980 | Less than 3 | - |
| 1979 | Less than 3 | - |
| 1978 | Less than 3 | - |
| 1977 | Less than 3 | - |
| 1976 | Less than 3 | - |
| 1975 | Less than 3 | - |
| 1974 | Less than 3 | - |
| 1973 | Less than 3 | - |
| 1972 | Less than 3 | - |
| 1971 | Less than 3 | - |
| 1970 | Less than 3 | - |
| 1969 | Less than 3 | - |
| 1968 | Less than 3 | - |
| 1967 | Less than 3 | - |
| 1966 | Less than 3 | - |
| 1965 | Less than 3 | - |
| 1964 | Less than 3 | - |
Source: CSO, Irish Babies’ Names, tables VSA50 and VSA60. Latest year: 2025.