Popularity in England and Wales
Numbers
| Theo (masculine) | |||
| Year | Rank | Percent Used | |
| 2023 | #11 | 0.821 | |
| 2022 | #9 | 0.904 | |
| 2021 | #15 | 0.785 | |
| 2020 | #17 | 0.826 | |
| 2019 | #16 | 0.829 | |
| 2018 | #19 | 0.812 | |
| 2017 | #21 | 0.752 | |
| 2016 | #29 | 0.638 | |
| 2015 | #33 | 0.587 | |
| 2014 | #37 | 0.563 | |
| 2013 | #41 | 0.491 | |
| 2012 | #44 | 0.435 | |
| 2011 | #50 | 0.379 | |
| 2010 | #50 | 0.398 | |
| 2009 | #55 | 0.365 | |
| 2008 | #58 | 0.357 | |
| 2007 | #73 | 0.275 | |
| 2006 | #91 | 0.219 | |
| 2005 | #118 | 0.141 | |
| 2004 | #113 | 0.148 | |
| 2003 | #126 | 0.121 | |
| 2002 | #137 | 0.104 | |
| 2001 | #142 | 0.095 | |
| 2000 | #156 | 0.075 | |
| 1999 | #212 | 0.045 | |
| 1998 | #231 | 0.041 | |
| 1997 | #229 | 0.041 | |
| 1996 | #243 | 0.036 | |
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