Pronunciation
Il-yam / Wil-yam
These spellings are a guide to the sound. Irish pronunciation can vary by dialect.
Meaning
Resolute protector
Alternate spellings
William; Liam
Fun fact
Uilliam is the Irish form of William, and Liam developed as a shorter form. So one of the most familiar Irish names has a longer relative you might not see as often. The name came to Ireland through Norman influence.
Popularity in Ireland
Figures for the spelling Uilliam, 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.
