Siani
Feminine · “God is gracious”
Siani is the Welsh affectionate form of Siân, which is Welsh for Jane — and Jane, in the end, is the feminine of John. The si at the front is a sh sound.
How old is the name Siani?
Siani first appears in US birth records in 1991 — 34 years ago. The typical Siani alive today was born around 2002, making them about 23 years old. About 1,200 people named Siani are estimated to be alive in the US today.
When was the name Siani most popular?
Siani peaked in 1998, reaching #1774 nationally. Today it ranks #3645, 1,871 places below that high. See the whole 1998 chart.
Lists built from the same records:
Where it comes from
From Jane to Siani
The story of Siani
Welsh has no letter for the sh sound and writes it si, which is why Siân looks unfamiliar and sounds entirely ordinary. It is the Welsh form of Jane, borrowed from English rather than inherited, and Siani is its affectionate extension — the same relation as Janey to Jane. It is used in Wales and reaches American records with Welsh families and with families who like the sound.
Meaning
God is gracious
From Hebrew Yohanan through Latin Iohanna and English Jane; Welsh spells the sh sound as si, so Jane becomes Siân and its diminutive Siani.
How the name formed
- Jane
- Siân
- Siani
Related forms: Siân · Jane · Sinéad
Pronouncing Siani
SHAH-nee
Two syllables, first stressed. The si is a sh sound, which English readers have no way of guessing.
Nicknames for Siani
Moderate
What the data says
146 years of official birth records
The long climb, and where it stands now
The same years in position rather than babies
- First recorded
- 1991
- Most girls named
- 199888 — the highest on record
- Peak rank
- #1774reached in 1998
- Change vs 2024
- +28.1%41 in 2025, from 32
Rank is a position, a count is a headcount, and they move independently — a name can hold its rank while the number of babies behind it falls. Source: U.S. Social Security Administration.
Siani in other languages
The same name elsewhere
- Siân in Welsh — related form
- Jane in English — related form
- Sinéad in Irish — related form
Strongest US states over the last decade: Texas, Pennsylvania, New York.
Sianis among us
people named Siani are estimated to be alive in the US today
About 1 girl in 39,202 born in 2025 was named Siani
Estimated from SSA birth records and published actuarial life tables. Method
Spellings of Siani
- #3645
- Siani on the 2025 chart
- #720
- counting every spelling
The SSA counts spellings, not names. Siani went to 41 girls in 2025, but Sianni, Ciani and Cianni and the rest below are the same name said out loud. Together the 9 spellings went to 242, which makes it the 720th most-given girls’ name of the year — 2,925 places above the chart.
and 1 rarer spelling.
About 1 girl in 6,642 born in 2025 was given one of these spellings — against 1 in 39,202 for Siani itself.
Spellings are grouped by a fixed rule that folds interchangeable English spellings of one sound (ck/k, ph/f, x/ks, a non-initial y for i) and keeps vowels apart, so Sean and Shawn stay separate names. It errs towards splitting: a family here is never larger than the truth. SSA national data, 2025. Method
Is it right for you
What happens to a name after it peaks
The Audria test
Every popular name lives one long story — a climb, a peak, a slow settling back. Siani's later chapters haven't been written yet, so we borrowed them: Audria climbed just as high around 1933, and its whole arc is on record. Line the two peaks up, and Audria's path sketches the road Siani is walking now.
Siani sits in the calm middle of the cycle — neither chasing a wave nor sliding off one. Middle-of-the-cycle names age slowly and predictably.
A scored estimate from 146 years of naming cycles — not a prophecy. Great names outlive statistics. How this is scored
Where Siani is headed
Siani looks set to keep climbing gently, with roughly 32% more babies a year by 2030 if the current curve holds. Its history is short or jumpy, though, so read this as a sketch rather than a promise.
Low confidence — fitted on official counts through 2025.
A damped-trend projection of the official birth data — a sketch of momentum, not a promise. Every name's forecast, ranked.
Siani beside its neighbors
The names ranked closest to Siani in 2025, in babies rather than position — the bars are to scale.
US girls given each name in 2025.
The trade-off
- A documented line back to one of the most-used names in European history.
- Five letters and two syllables, quick to write.
- It is thoroughly Welsh while being, underneath, entirely familiar.
- English readers will say SEE-ah-nee, which is not the Welsh sound at all.
- Siân, Siani and Shani are all in use and get confused.
- It is a diminutive by construction, which some families will mind.
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What they receive
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Siani
Feminine · #3645 in the U.S.
Frequently asked
- How many Sianis are there in the world?
- No country counts the world's names, so there is no worldwide figure — anyone quoting one is estimating. About 1,200 people named Siani are estimated to be alive in the US today.
- How do you spell Siani?
- Siani is one of 8 recorded spellings. Sianni is the more common one — 128 births in 2025 against 41 for Siani.
- How popular is the name Siani in 2025?
- Siani ranks #3645 among US girl names in 2025, with 41 babies given the name.
- How rare is the name Siani?
- About 1 in every 39,202 US girls born in 2025 was named Siani — 41 in all.
- Will my child share the name Siani with classmates?
- Siani will almost certainly be the only one in school.
Ranked beside Siani
Names sitting at a similar level of popularity right now.
Elenor#3645 · Azucena#3645 · Alaura#3645 · Judah#3645 · Rylen#3645 · Zamiyah#3645 · Naiara#3645 · Marietta#3645
Looking for what else is popular rather than what resembles Siani? See the current top 100.
Choosing between Siani and another name?
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US figures from the Social Security Administration. 1880–2025. Data & methodology
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