Popularity in Northern Ireland
Numbers
| Isaac (masculine) | |||
| Year | Rank | Percent Used | |
| 2023 | #27 | 0.627 | |
| 2022 | #40 | 0.533 | |
| 2021 | #31 | 0.582 | |
| 2020 | #20 | 0.752 | |
| 2019 | #23 | 0.677 | |
| 2018 | #33 | 0.620 | |
| 2017 | #24 | 0.714 | |
| 2016 | #25 | 0.716 | |
| 2015 | #42 | 0.576 | |
| 2014 | #33 | 0.662 | |
| 2013 | #37 | 0.589 | |
| 2012 | #47 | 0.515 | |
| 2011 | #40 | 0.585 | |
| 2010 | #57 | 0.480 | |
| 2009 | #62 | 0.430 | |
| 2008 | #71 | 0.409 | |
| 2007 | #87 | 0.304 | |
| 2006 | - | - | |
| 2005 | #93 | 0.273 | |
| 2004 | - | - | |
| 2003 | - | - | |
| 2002 | - | - | |
| 2001 | - | - | |
| 2000 | - | - | |
| 1999 | - | - | |
| 1998 | - | - | |
| 1997 | - | - | |
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