Sydnii
Girl nameSydnii has been given to 6 babies in the U.S. since 2001. It peaked in 2001.
Popularity over time births per year, 1880–2025
Total babies
6
Peak year
2001 (6 babies)
Rank in 2025
Below top 1000
First recorded
2001
10-year trend
New / returning
Gender split
All girls
Spellings & variants
Names one letter away from Sydnii — alternate spellings parents actually use.
Names with a similar vibe
Same primary gender, peaked around the same years, and roughly as common as Sydnii.
Sibling name ideas for Sydnii
Same era and popularity as Sydnii, avoiding matching initials or rhymes.
FAQ
How popular is the name Sydnii?
Sydnii has been given to 6 babies in the U.S. since 2001. It ranked below the top 1000 in 2025.
When did the name Sydnii peak?
Sydnii peaked in 2001, when 6 babies were given the name.
Is Sydnii a girl or boy name?
Sydnii is primarily a girl name (100% of babies named Sydnii are girls).
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