Sian
Boy name · #4102 in 2025 · Uniqueness 49/100
In 2025, 26 baby boys were named Sian, placing it at #4102 in the official national rankings. It has appeared in the national data since 1995. Roughly one in every 69,231 boys born in 2025 was named Sian.
The 30-year story
Sian first appears in the Social Security records in 1995, when 6 boys received the name. Its all-time peak is essentially right now: 2025, with 26 babies and a rank of #4050. Names at their peak can keep climbing — or be one trend cycle from the long slide that eventually hits most popular names. Following the curve matters more than today's snapshot: a name's position on its rise-peak-decline arc is the best predictor of how common it will feel in a kindergarten class five years from now.
Babies named Sian per year, 1880–2025. Source: SSA.
Unlock the 5-year forecast and compare Sian against up to 5 other names.
Uniqueness: will there be another Sian in class?
Sian scores 49 out of 100 on our uniqueness scale, which blends current rarity with five-year momentum — putting it in the "distinctive" band. That middle band is the sweet spot many parents hunt for: recognizable without being everywhere.
Where Sian is most common
State-level data for Sian is sparse in 2025 — the name's footprint is too small for most states to report (the SSA suppresses counts under 5 per state for privacy).
Names like Sian
Statistically, parents drawn to Sian tend to be choosing among names with similar popularity arcs, era profiles, and sounds — the closest matches in our model are Yian, Vian, Zian, Edrian, and Evian.
YianVianZianEdrianEvianIlianYulianKaspian
Rank history (last 25 years)
| Year | Babies named Sian | Rank |
|---|---|---|
| 2025 | 26 | #4050 |
| 2024 | 9 | #8312 |
| 2023 | 13 | #6517 |
| 2022 | 11 | #7262 |
| 2021 | 14 | #6032 |
| 2020 | 12 | #6620 |
| 2019 | 8 | #8889 |
| 2018 | 8 | #8819 |
| 2017 | 7 | #9696 |
| 2016 | 9 | #8146 |
| 2014 | 5 | #12108 |
| 2012 | 5 | #12274 |
| 2010 | 6 | #10766 |
| 2008 | 7 | #9871 |
| 2007 | 6 | #10921 |
| 2002 | 8 | #7643 |
| 2000 | 6 | #9112 |
| 1999 | 6 | #8704 |
| 1995 | 6 | #7792 |
Frequently asked questions
Is Sian a popular boy name?
Sian ranked #4102 among boys in 2025 with 26 babies given the name — outside the top 500, making it an uncommon pick. Ten years earlier it ranked outside the reported range.
When was the name Sian most popular?
Sian peaked in 2025, when 26 American boys received the name (ranked #4050 that year). That peak is current — the name is at or near its all-time high right now.
How rare is the name Sian?
In 2025, roughly 1 in 69,231 newborn American boys was named Sian. It scores 49/100 on our uniqueness scale (rarity blended with momentum), which we classify as "distinctive".
Data source: U.S. Social Security Administration name statistics, 1880–2025, national and state files. Counts reflect Social Security card applications; names with fewer than 5 occurrences in a state-year are suppressed by the SSA.