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Sydney

♀ Girl

Pronounced SID-nee /ˈsɪd.ni/High

Meaning: From the English surname Sidney, from the Old English 'sid' (wide) and 'eg' (island), meaning 'wide island', or a contracted form of Saint-Denis in Normandy, France.High

In 30 seconds: Sydney is a polished English surname name that crossed from boys to girls in the 1990s and has remained firmly feminine. Its geographic associations with cosmopolitan Australia give it a sense of global openness.
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Origin HighOld English, French
MeaningFrom the English surname Sidney, from the Old English 'sid' (wide) and 'eg' (island), meaning 'wide island', or a contracted form of Saint-Denis in Normandy, France.
U.S. rank (2025)#348 ↘ Falling
2025 U.S. births873 girls (0.05% of U.S. girls)
Peak year2000
Total births (all-time)≈ 178,286

Popularity in the U.S. · SSA data

peak 200018862025

U.S. births per year (Social Security Administration, 1880–present). Pink marker = peak year.

History & Origin

Sydney derives from the English surname Sidney, which has two possible origins: Old English sid eg (wide island or water meadow) or the Norman place name Saint-Denis-en-France, contracted to Sidney. The Sidney family became prominent in English history — Sir Philip Sidney (1554–1586) was the Elizabethan poet and soldier considered the perfect Renaissance gentleman.

Sydney as a given name was initially male but crossed to girls in the United States in the 1990s, partly influenced by the television series Alias (2001–2006), whose protagonist was Sydney Bristow. It entered the US top 20 girls' names in the early 2000s and has remained in the top 100. The Australian city adds a cosmopolitan, modern geographic dimension to the name's appeal.

Did you know? Sydney, Australia, was named after Thomas Townshend, 1st Viscount Sydney (1733–1800), the British Home Secretary who authorized the First Fleet — yet the city's name is spelled with a y while the original Viscount Sidney spelled his name with an i, making it a 200-year-old spelling discrepancy.
Overall data confidence 88%
Oxford Dictionary of English Surnames — Old English and Norman origins of Sidney/SydneySocial Security Administration Name Data — US gender crossover and popularity peak

Variations

SidneySydneeSydnie

Nicknames

SydSid

Famous Bearers

  • ★Thomas Townshend, 1st Viscount Sydney (1733–1800)
    British statesman after whom Sydney, Australia was named.

If you like Sydney…

Kendall— two-syllable English surname name that made the same feminine crossover in the same era
Morgan— two-syllable Welsh surname name used for both genders with the same modern American appeal
Ashley— two-syllable Old English surname that crossed from male to female use in the same generation

Frequently Asked

What does the name Sydney mean?

Sydney means 'wide island', from Old English sid (wide) and eg (island), or from the Norman place Saint-Denis.

How do you pronounce Sydney?

Sydney is pronounced SID-nee (/ˈsɪd.ni/), two syllables with stress on the first.

Is Sydney a boy or girl name?

Sydney was originally a male name but crossed to girls in the 1990s and is now predominantly feminine in the US.

How popular is Sydney?

Sydney reached the US top 20 girls' names in the early 2000s and remains in the top 100.