Sienne is a very rare variant of Sienna that peaked in 2023 and remains in steady use.
Sienne is a girl name. In 2025 it ranked #16,929 for girl births in the United States (and #28,003 across all names), given to 5 babies. Sienne was first reported in SSA data in 1998 and peaked in 2023 (6 births).
Girls named Sienne per year · hover for count and girls rank · Source: U.S. Social Security Administration, national data 1998–2025 · U.S.+territories from SSA territory files (1998–2025) · SSA publishes a name only in years it was given to at least 5 babies, so a name may have been in use before — or between — the years shown here