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Sydni

Girl name · English · French

Meaningwide island · English form of Sydney

Sydni is an English and French girl name meaning “wide island”. It's a form of Sydney, so it shares that name's history while sounding a little different. English names tend to be easy to say and spell, which helps them travel well. A meaning like this gives a child something to grow into, and a good story to tell when someone asks about their name. It draws on the natural world. It sounds soft and friendly, it's easy to spell and quick to call across a playground, and it pairs well with middle names of almost any length.

Did you know?

  • GenerationSydni peaked in 2000, which makes it a Gen Z name. The typical Sydni you'd meet today is about 25 years old.
  • Roll callIn a typical school of 500 kids, your Sydni would very likely be the only one. About 1 in 200,000 baby girls got the name in 2025.
  • HistorySydni first shows up in US birth records in 1947, the first year at least 5 babies got it. It has been in use for 78 years since.
Baby in a floral onesie lying on a bed
hello, little Sydni

US births per million girls, 1947–2025

01302601947196020002025

Similar names

Unisex name: SydneyUnisex name: SydneeGirl name: SydelleGirl name: Sydnie
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Popularity: U.S. Social Security Administration (babies with 5+ births per year).

About the name Sydni

Sydni is a girl name of English and French origin meaning “wide island”. Its two syllables give it an easy rhythm, and the open vowel at the end makes it sound soft and warm. It hit its peak in the 2000s, so it feels familiar without being trendy. It's rarely heard today, so it stands out while still being a real, established name.

Origin:English namesFrench names

More English girl names

Questions about the name Sydni

What does the name Sydni mean?

Sydni means “wide island” and comes from English, as a form of Sydney. Other girl names with a similar meaning include Sydney (“wide island”), Kelsey (“Ceol's island”), Whitney (“white island”) and Lyle (“from the island”).

What is the origin of the name Sydni?

Sydni is English and French in origin. Names often travel between languages and cultures, which is why Sydni turns up in more than one tradition. Other English names to consider are Olivia (“olive tree”), Charlotte (“free”), Harper (“harp player”) and Elizabeth (“God is my oath”).

Is Sydni a boy or girl name?

Sydni is a girl name. In 2025, 8 US girls were named Sydni.

How popular is the name Sydni?

Sydni ranked #10,917 for US girls in 2025, given to 8 babies. Its best year was 2000, when it reached #557. Over the last five years it has slipped 6,269 places.

What names are similar to Sydni?

If you like Sydni, you might also like Sidni, Sidny, Sydny, Sydney and Kelsey. Sidni is another spelling of the same name.

What should I know before naming my baby Sydni?

Sydni is an English and French girl name meaning “wide island”. It's a form of Sydney, so it shares that name's history while sounding a little different. English names tend to be easy to say and spell, which helps them travel well. A meaning like this gives a child something to grow into, and a good story to tell when someone asks about their name. It draws on the natural world. It sounds soft and friendly, it's easy to spell and quick to call across a playground, and it pairs well with middle names of almost any length. Say it out loud with your last name and any middle names you're considering, and check the initials it makes.