Total babies named Colwyn (all years): 58
| Year | Boys (count / rank / %) |
|---|---|
| 2021 | 5 / #12490 / 0.000% |
| 2020 | 5 / #12404 / 0.000% |
| 2012 | 6 / #11059 / 0.000% |
| 2010 | 6 / #11004 / 0.000% |
| 2009 | 7 / #10072 / 0.000% |
| 2005 | 6 / #10346 / 0.000% |
| 2003 | 5 / #11205 / 0.000% |
| 2002 | 5 / #10978 / 0.000% |
| 1997 | 8 / #6723 / 0.000% |
| 1985 | 5 / #6718 / 0.000% |