Si
A unisex name with no widely documented etymology — one syllable, given to 6 babies a year in the US.
Si by the numbers
Si was given to 6 American babies in 2017, the most recent full year we hold.
Its American peak was 15 babies in 2013, making it a 2010s name.
What we can tell you about Si
Not every name has a meaning to trace. Plenty are coined rather than inherited — invented outright, blended from two names, or respelled from an older one — and where we cannot find an etymology we can stand behind, we would rather say so than make one up. What follows comes from the birth records themselves.
Spelled almost the same
Other names in the records within a letter or two of Si. Close spellings are not always related names, but they are usually worth seeing together.
Sounds like Si
Names that are said the same way as Si, however they are written. Sounding alike does not mean they share a history.