Si
Boy nameSi has been given to 185 babies in the U.S. since 1927. It peaked in 2013.
Popularity over time births per year, 1880–2025
Total babies
185
Peak year
2013 (15 babies)
Rank in 2025
Below top 1000
First recorded
1927
10-year trend
New / returning
Gender split
10% girls / 90% boys
Spellings & variants
Names one letter away from Si — alternate spellings parents actually use.
Names with a similar vibe
Same primary gender, peaked around the same years, and roughly as common as Si.
FAQ
How popular is the name Si?
Si has been given to 185 babies in the U.S. since 1927. It ranked below the top 1000 in 2025.
When did the name Si peak?
Si peaked in 2013, when 15 babies were given the name.
Is Si a girl or boy name?
Si is primarily a boy name (90% of babies named Si are boys).
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