MallowbyNames

Sydni

SID-nee · Variant of Sydney; originally a place name from Old English meaning 'wide island' or 'wide meadow'.

2025 rank (girls)
#10,917
Babies named in 2025
8
Peak popularity
2000
2025 frequency
1 in 200,908 girls
Usually for
Girls
Trend
Declining since 2000

Declining since 2000, #10,917 for girls today.

Popularity of Sydni since 1947

Babies named Sydni per year in U.S. Social Security records.

1563124681960198020002020Most births 2000Girls
Data table (by decade)
DecadeGirls
1940s5
1950s0
1960s9
1970s18
1980s217
1990s1,946
2000s2,503
2010s575
2020s88

Meaning & origin

Sydni is a modern spelling variant of Sydney that emerged in the late 20th century, first recorded in U.S. data in 1947. The name reached its peak popularity in the year 2000, but has since been declining in use. In the most recent year, 2025, Sydni ranked #10,917 and was given to approximately 1 in every 200,908 newborn girls. The spelling variant Sydni is much less common than the standard Sydney, and it has not been recorded in the top 1,000 names since the early 2000s. The name is typically given to girls, reflecting the broader trend of Sydney and its variants shifting toward feminine usage. While not widely used in any particular state, Sydni has a contemporary feel and is often chosen by parents seeking a unique spelling of a familiar name.

Sydni is a modern spelling variant of Sydney, which began as an English surname derived from a place name. The place name Sydney has Old English roots from 'sīd' (wide) and 'ēa' (river) or 'īeg' (island), meaning 'wide island' or 'wide riverbank'. The name gained popularity as a given name in the late 20th century, largely due to the unisex appeal of Sydney, and Sydni emerged as a distinct spelling variant particularly used for girls.

Where Sydni is most popular

Births per 100,000 girls by state. Press play or drag the slider to watch it move across the decades. The lightest shade means too few recorded births.

2020s
Fewermore per 100k girlstoo few births

Nicknames & variants

Nicknames: Syd

Variants: Sydney, Sidney, Sydnie, Sidni

Sibling names for Sydni

Names that share Sydni's style, for a brother or sister.

A parent animal hugging its little one, the personalized name page

S is for Sydni, our favorite little girl.

S is for Sydni…”

In a Mallowby alphabet book, Sydni's letter becomes Sydni's page: hand-illustrated, printed hardcover or paperback, made just for them.

Make Sydni's book

Books for siblings or grandkids? The second book is 15% off.

Questions parents ask

What does the name Sydni mean?
Sydni is a variant of Sydney, which originally comes from an Old English place name meaning 'wide island' or 'wide meadow'.
How popular is the name Sydni?
Sydni is a rare name. In 2025, it ranked #10,917 in the United States, meaning it was given to roughly 1 in every 200,908 newborn girls.
Is Sydni a boy or girl name?
Sydni is primarily used for girls, though it is a variant of the unisex name Sydney.