Total babies named Tregan (all years): 64
| Year | Boys (count / rank / %) |
|---|---|
| 2016 | 6 / #12045 / 0.000% |
| 2013 | 6 / #12019 / 0.000% |
| 2010 | 5 / #14083 / 0.000% |
| 2009 | 6 / #12347 / 0.000% |
| 2008 | 11 / #7663 / 0.001% |
| 2007 | 5 / #14227 / 0.000% |
| 2006 | 8 / #9505 / 0.000% |
| 2004 | 7 / #9862 / 0.000% |
| 2003 | 5 / #12618 / 0.000% |
| 1999 | 5 / #11482 / 0.000% |