Brannan is a rare variant of Brennan that peaked in 1995 and has since faded.
Brannan is predominantly a boy name. It last appears in U.S. records in 2021. Brannan first appears in 1971 and peaked in 1978 (16 births).
| Year | U.S. births | U.S. + territories | ♀ Rank | ♂ Rank |
|---|---|---|---|---|
| 2021 | 5 | 5 | — | #12,415 |
| 2016 | 6 | 6 | — | #10,936 |
| 2012 | 5 | 5 | — | #12,532 |
| 2011 | 6 | 6 | — | #11,002 |
| 2010 | 9 | 9 | — | #8,232 |
| 2009 | 10 | 10 | — | #7,757 |
| 2008 | 10 | 10 | — | #7,769 |
| 2007 | 7 | 7 | — | #9,900 |
| 2006 | 7 | 7 | — | #9,703 |
| 2005 | 8 | 8 | — | #8,389 |
| 2004 | 7 | 7 | — | #9,059 |
| 2003 | 13 | 13 | — | #5,594 |
| 2002 | 14 | 14 | — | #5,164 |
| 2001 | 9 | 9 | — | #6,994 |
| 2000 | 12 | 12 | — | #5,616 |
| 1999 | 13 | 13 | — | #5,067 |
| 1998 | 11 | 11 | — | #5,509 |
| 1997 | 15 | — | — | #4,269 |
| 1996 | 13 | — | — | #4,637 |
| 1995 | 17 | — | #13,699 | #4,825 |
| 1994 | 7 | — | — | #7,052 |
| 1993 | 11 | — | — | #5,042 |
| 1992 | 7 | — | — | #6,744 |
| 1991 | 10 | — | — | #5,135 |
| 1990 | 9 | — | — | #5,424 |
| 1989 | 13 | — | — | #4,041 |
| 1988 | 6 | — | — | #6,521 |
| 1987 | 10 | — | — | #4,279 |
| 1986 | 6 | — | — | #6,015 |
| 1985 | 10 | — | — | #4,081 |
| 1984 | 8 | — | — | #4,603 |
| 1983 | 5 | — | — | #6,354 |
| 1982 | 10 | — | — | #3,993 |
| 1981 | 10 | — | — | #3,885 |
| 1980 | 13 | — | — | #3,278 |
| 1979 | 16 | — | #9,119 | #3,836 |
| 1978 | 16 | — | — | #2,680 |
| 1977 | 7 | — | — | #4,641 |
| 1976 | 8 | — | — | #4,049 |
| 1975 | 6 | — | — | #4,861 |
| 1971 | 7 | — | — | #4,011 |