MallowbyNames

Sidnie

SID-nee · of uncertain origin; possibly a feminine form of Sidney or a variant of Sydney

Peak popularity
2001
Usually for
Girls
Trend
Holding steady

Holding steady.

Popularity of Sidnie since 1990

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

918271990200020102020Most births 2001Girls
Data table (by decade)
DecadeGirls
1990s144
2000s145
2010s23
2020s0

Meaning & origin

Sidnie is an uncommon given name that emerged in the United States in the 1990s, first recorded in 1990. Its usage peaked modestly in 2001, but the name has since settled into a stable, low-frequency trajectory, never reaching the top 1000 national rankings. Sidnie is almost exclusively used for girls, and its spelling distinguishes it from the more common Sydney. The name has not been associated with any particular state or region in terms of popularity, reflecting its rare, scattered usage. Sidnie's appeal lies in its variant spelling, offering a less conventional alternative to Sydney while retaining a familiar sound.

Sidnie is a modern English name, likely a variant of Sidney or Sydney, which themselves derive from an Old English place name meaning 'wide island' (from sid 'wide, spacious' and ēg 'island'). The name Sidney was originally a surname and later used as a given name for both boys and girls, with the feminine spelling Sydney becoming popular in the 20th century. Sidnie represents a less common spelling variant, possibly influenced by the -ie ending often seen in feminine names.

Nicknames & variants

Nicknames: Sid, Siddy, NieNie

Variants: Sydney, Sidney, Sydnie, Sydnee

Sibling names for Sidnie

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

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

S is for Sidnie, our favorite little girl.

S is for Sidnie…”

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

Make Sidnie's book

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

Questions parents ask

What does the name Sidnie mean?
The meaning of Sidnie is uncertain. It is likely a variant of Sidney or Sydney, which can mean 'wide island' from Old English. The name has no established meaning of its own.
How popular is the name Sidnie currently?
Sidnie is a rare name. According to U.S. Social Security data, it has not ranked in the top 1000 names in recent years. It saw a peak in usage in 2001, but current data for 2025 shows it remains very uncommon.
Is Sidnie a boy's or girl's name?
Sidnie is almost exclusively used as a girl's name. Historical U.S. data typically records it for girls, and its spelling with the -ie ending aligns with feminine naming conventions.