What is Si short for?
Si is short for Silas and Simon.
The names behind Si
Each count is the number of children given that name in the United States in 2025, from US Social Security records. A name given to fewer than five children in a year is left out of the published file.
Silas Latin origin
Si from Silas: the old short form, shared with Simon.
7 girls and 4,639 boys named Silas in 2025
Simon Hebrew origin
Which of these fits YOUR family? →
Si from Simon: the old short form, shared with Silas.
1,529 boys named Simon in 2025