Popularity in Northern Ireland
Numbers
| William (masculine) | |||
| Year | Rank | Percent Used | |
| 2023 | #58 | 0.402 | |
| 2022 | #67 | 0.365 | |
| 2021 | #61 | 0.414 | |
| 2020 | #68 | 0.399 | |
| 2019 | #53 | 0.471 | |
| 2018 | #60 | 0.431 | |
| 2017 | #50 | 0.487 | |
| 2016 | #40 | 0.563 | |
| 2015 | #49 | 0.480 | |
| 2014 | #47 | 0.518 | |
| 2013 | #36 | 0.638 | |
| 2012 | #42 | 0.562 | |
| 2011 | #34 | 0.624 | |
| 2010 | #36 | 0.619 | |
| 2009 | #40 | 0.586 | |
| 2008 | #30 | 0.735 | |
| 2007 | #32 | 0.711 | |
| 2006 | #33 | 0.766 | |
| 2005 | #32 | 0.749 | |
| 2004 | #35 | 0.706 | |
| 2003 | #38 | 0.658 | |
| 2002 | #30 | 0.837 | |
| 2001 | #26 | 0.948 | |
| 2000 | #27 | 0.935 | |
| 1999 | #29 | 0.913 | |
| 1998 | #31 | 0.821 | |
| 1997 | #26 | 1.063 | |
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