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The first name Cydney

A girl’s name.

2 syllables Female

Meaning and origin

A female given name, variant of Sydney.

A form of Sydney.

From Wiktionary (CC BY-SA 4.0).

Popularity

Babies registered in England and Wales, 1996–2025

Cydney last appeared in the official list in 2024, given to 4 girls. It peaked in 2003, with 46 births (#630).

02550 1996200020052010201520202025
500
babies named Cydney, 1996–2025
#4,843
rank in 2024
2003
peak year

Office for National Statistics; years with fewer than three births are not published and show as zero. Compare Cydney with other names.

Popularity in the United States

Babies named Cydney at birth, 1880–2025

In 2025, 9 girls born in the United States were named Cydney, the 10,273rd most popular girls’ name that year. It was used most in 1998, when 227 were.

0150300 188018851890189519001905191019151920192519301935194019451950195519601965197019751980198519901995200020052010201520202025
5,170
babies named Cydney since 1880
#10,273
rank in 2025
1998
peak year

US Social Security Administration, from applications for a Social Security card. A name is only published for a year when at least five babies were given it, so quieter years show as zero.

Questions

How popular is the name Cydney?
In 2024, 4 girls born in England and Wales were named Cydney, ranking 4,843rd. Its peak was 2003, with 46 births.
Is Cydney a boy's or a girl's name?
Mostly a girl's name: 100% of the 5,170 US babies named Cydney since 1880 were girls.
When was Cydney most popular?
1998 in the United States, when 227 babies were named Cydney, its highest rank at 921st.
What name is Cydney a form of?
Cydney is a form of Sydney.