MallowbyNames

Sidni

SID-nee · Variant of Sydney, derived from the French place name Saint-Denis.

Peak popularity
1995
Usually for
Girls
Trend
Holding steady

Holding steady.

Popularity of Sidni since 1949

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

714211960198020002020Most births 1995Girls
Data table (by decade)
DecadeGirls
1940s5
1950s0
1960s0
1970s0
1980s8
1990s112
2000s99
2010s12
2020s0

Meaning & origin

Sidni, a modern spelling variant of Sydney, first appeared in U.S. birth records in 1949. It saw its peak usage in 1995, and by 2025 it did not rank among the top 1000 names, reflecting a stable but low frequency. As a feminine variant of the French place name Saint-Denis, Sidni represents the trend of adapting place names into given names, particularly in the 1990s. Despite its low rank, the name maintains a consistent if modest presence, appealing to parents seeking a familiar yet distinctive alternative.

Sidni is a modern spelling variant of Sydney, which itself originates from the French Saint-Denis, referring to the city in France. The name was adopted as a given name in the English-speaking world, particularly as a feminine form, and gained popularity in the late 20th century.

Nicknames & variants

Nicknames: Sid

Variants: Sydney, Sidney

Sibling names for Sidni

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

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

S is for Sidni, our favorite little girl.

S is for Sidni…”

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

Make Sidni's book

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

Questions parents ask

What does the name Sidni mean?
Sidni is a variant of Sydney, derived from the French place name Saint-Denis, meaning 'from Saint-Denis'.
How popular is the name Sidni?
Sidni reached its peak popularity in 1995, but in 2025 it did not rank among the top 1000 names in the U.S.
Is Sidni a boy or girl name?
Sidni is primarily used as a feminine name, though it can be unisex.