| [ 1 syll. si ] The boy name Si is pronounced as SIY KEY. Si is used predominantly in the English language and its origin is Hebrew. Si is a short form of the name Simon (English, French, and German). Si is rare as a baby boy name. It is not listed in the top 1000. In 2007, within the family of boy names directly linked to Si, Simon (English, French, and German) was the most popular. Baby names that sound like Si include Cye (English), Sage (English), Shaw (English), Shay (English), Shea (English and Irish), Siek (Czech), Sigge (Scandinavian), Sky (English), Skye (English), Cy (English), Sacha (French), Sasa (English, Russian, and Slavic), Sascha (German), Sasha (Russian and English), Shaye (English), Sigi (German), Sixtus (English and German), and Cus (English). KEY: Pronunciation for Si: S as in "sea (S.IY)" ; IY as in "eat (IY.T)"
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