Si is a boy name. It last appeared in U.S. Social Security records in 2017. Si first appears in the data in 1927 and reached its peak in 2013 (15 births). The chart below shows how the name has risen and fallen over time.
| Year | U.S. births | Rank |
|---|---|---|
| 2017 | 6 | #23,372 |
| 2014 | 5 | #26,961 |
| 2013 | 15 | #12,902 |
| 2012 | 8 | #19,993 |
| 2011 | 8 | #19,941 |
| 2010 | 5 | #27,593 |
| 2009 | 8 | #20,384 |
| 2007 | 10 | #17,624 |
| 2006 | 6 | #24,409 |
| 2004 | 7 | #20,383 |
| 2003 | 7 | #19,959 |
| 2001 | 5 | #24,445 |
| 1999 | 5 | #22,897 |
| 1998 | 8 | #16,068 |
| 1993 | 7 | #16,404 |
| 1989 | 9 | #12,431 |
| 1987 | 6 | #14,970 |
| 1982 | 5 | #15,883 |
| 1981 | 7 | #12,358 |
| 1980 | 11 | #9,067 |
| 1976 | 6 | #12,364 |
| 1972 | 8 | #9,094 |
| 1950 | 5 | #8,809 |
| 1942 | 5 | #8,104 |
| 1934 | 8 | #5,740 |
| 1927 | 5 | #9,252 |