Popularity in Northern Ireland
Numbers
| Thomas (masculine) | |||
| Year | Rank | Percent Used | |
| 2023 | #12 | 1.010 | |
| 2022 | #10 | 1.001 | |
| 2021 | #11 | 0.961 | |
| 2020 | #6 | 1.105 | |
| 2019 | #8 | 1.200 | |
| 2018 | #9 | 1.223 | |
| 2017 | #7 | 1.328 | |
| 2016 | #14 | 0.942 | |
| 2015 | #9 | 1.257 | |
| 2014 | #10 | 1.172 | |
| 2013 | #11 | 1.170 | |
| 2012 | #14 | 1.085 | |
| 2011 | #11 | 1.248 | |
| 2010 | #13 | 1.215 | |
| 2009 | #9 | 1.359 | |
| 2008 | #8 | 1.371 | |
| 2007 | #7 | 1.478 | |
| 2006 | #13 | 1.374 | |
| 2005 | #12 | 1.384 | |
| 2004 | #12 | 1.525 | |
| 2003 | #14 | 1.450 | |
| 2002 | #12 | 1.508 | |
| 2001 | #9 | 1.736 | |
| 2000 | #12 | 1.466 | |
| 1999 | #13 | 1.449 | |
| 1998 | #14 | 1.642 | |
| 1997 | #15 | 1.509 | |
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