Sydney
GirlsBest rank #48 (2009) · ranked in 6 years
Sydney slipped from #49 in 2008 to #98 in 2013. Its best showing in SSA data was #48 in 2009, when 5,061 newborns were given the name. It appears in the tracked top rankings for 6 of the 18 years covered (2008–2025).
Source: U.S. Social Security Administration (SSA) — Popular Baby Names (national)