Trend of the Popularity of Brennan as a Male Baby Name in Illinois
Updated on December 6, 2025.
Data Source: Social Security Administration (SSA).
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In 2024, there were 6 male babies that were named Brennan in Illinois, which was 0.01% of the total number of male babies born in Illinois in 2024. Between 1981 and 2024, the name Brennan peaked as a male baby name in Illinois in 2009 with a count of 58 babies, which was 0.08% of the total male babies born in Illinois in 2009.
The first chart below show the trend of the number of male babies in Illinois that were named Brennan, and the second chart shows the percent of male babies in Illinois that were named Brennan.
Trend of the Number of Male Babies who were Named Brennan in Illinois
Trend of the Percentage of Male Babies who were Named Brennan in Illinois
The table below below shows the trend of the number of male babies and the percentage of male babies born in Illinois who were named Brennan from 1981 to 2024.
Trend of the Popularity of Brennan as a Male Baby Name in Illinois
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| Year | Number of Male Babies | Percent of Total Male Babies (%) |
|---|---|---|
| 1981 | 8 | 0.01 |
| 1982 | 11 | 0.01 |
| 1983 | 9 | 0.01 |
| 1984 | 7 | 0.01 |
| 1985 | 15 | 0.02 |
| 1986 | 16 | 0.02 |
| 1987 | 27 | 0.03 |
| 1988 | 22 | 0.03 |
| 1989 | 21 | 0.02 |
| 1990 | 42 | 0.05 |
| 1991 | 33 | 0.04 |
| 1992 | 28 | 0.03 |
| 1993 | 26 | 0.03 |
| 1994 | 35 | 0.04 |
| 1995 | 43 | 0.05 |
| 1996 | 30 | 0.04 |
| 1997 | 38 | 0.05 |
| 1998 | 39 | 0.05 |
| 1999 | 45 | 0.06 |
| 2000 | 44 | 0.06 |
| 2001 | 49 | 0.06 |
| 2002 | 36 | 0.05 |
| 2003 | 52 | 0.07 |
| 2004 | 33 | 0.04 |
| 2005 | 46 | 0.06 |
| 2006 | 42 | 0.06 |
| 2007 | 45 | 0.06 |
| 2008 | 46 | 0.06 |
| 2009 | 58 | 0.08 |
| 2010 | 50 | 0.07 |
| 2011 | 40 | 0.06 |
| 2012 | 47 | 0.07 |
| 2013 | 37 | 0.06 |
| 2014 | 23 | 0.04 |
| 2015 | 26 | 0.04 |
| 2016 | 14 | 0.02 |
| 2017 | 20 | 0.03 |
| 2018 | 14 | 0.02 |
| 2019 | 13 | 0.02 |
| 2020 | 6 | 0.01 |
| 2021 | 16 | 0.03 |
| 2022 | 13 | 0.03 |
| 2023 | 5 | 0.01 |
| 2024 | 6 | 0.01 |