Total babies named Rhiannan (all years): 171
| Year | Girls (count / rank / %) |
|---|---|
| 2009 | 7 / #14895 / 0.000% |
| 2008 | 5 / #19833 / 0.000% |
| 2006 | 5 / #19407 / 0.000% |
| 2005 | 6 / #16015 / 0.000% |
| 2004 | 5 / #18204 / 0.000% |
| 2003 | 7 / #13510 / 0.000% |
| 2002 | 9 / #10899 / 0.001% |
| 2001 | 7 / #13174 / 0.000% |
| 2000 | 7 / #12841 / 0.000% |
| 1999 | 7 / #12370 / 0.000% |
| Year | Girls (count / rank / %) |
|---|---|
| 1998 | 14 / #7011 / 0.001% |
| 1997 | 9 / #9642 / 0.001% |
| 1995 | 8 / #10290 / 0.000% |
| 1994 | 6 / #13034 / 0.000% |
| 1992 | 8 / #10242 / 0.000% |
| 1991 | 10 / #8445 / 0.001% |
| 1990 | 8 / #9936 / 0.000% |
| 1989 | 8 / #9449 / 0.000% |
| 1986 | 5 / #12331 / 0.000% |
| 1985 | 6 / #10319 / 0.000% |
| Year | Girls (count / rank / %) |
|---|---|
| 1984 | 5 / #11711 / 0.000% |
| 1982 | 6 / #10153 / 0.000% |
| 1980 | 6 / #10041 / 0.000% |
| 1978 | 7 / #8323 / 0.000% |