Brennin is a very rare variant of Brennan that was most common in the 2010s and has all but disappeared.
Brennin is a boy name. It last appears in U.S. records in 2015. Brennin was first reported in SSA data in 1992 and peaked in 2012 (23 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 2015 | 5 | 5 | #12,337 |
| 2012 | 23 | 23 | #4,269 |
| 2011 | 14 | 14 | #5,987 |
| 2010 | 17 | 17 | #5,280 |
| 2009 | 19 | 19 | #4,946 |
| 2008 | 11 | 11 | #7,260 |
| 2007 | 10 | 10 | #7,671 |
| 2006 | 6 | 6 | #10,843 |
| 2005 | 12 | 12 | #6,275 |
| 2004 | 9 | 9 | #7,603 |
| 2003 | 12 | 12 | #5,921 |
| 2002 | 9 | 9 | #7,119 |
| 2001 | 7 | 7 | #8,439 |
| 2000 | 9 | 9 | #6,917 |
| 1999 | 8 | 8 | #7,233 |
| 1998 | 14 | 14 | #4,674 |
| 1997 | 8 | — | #6,684 |
| 1994 | 6 | — | #7,894 |
| 1992 | 8 | — | #6,197 |