| Siadhal | Irish | Ancient name derived from siadhail .. |  |  |
| Siaki | Polynesian | Tongan form of Jack (God is graciou.. | | |
| Siaosi | Polynesian | Tongan form of George (earthworker,.. |  | |
| Siarl | Welsh | Welsh cognate of Charles (full-grow.. | | |
| Siddharth.. | Indian | Meaning "one whose ambitions have b.. | | |
| Sidney | English | Transferred use of the surname orig.. |  | |
| Sidney | French | Signifying "from Saint Denis, Franc.. | | |
| Sidonio | Spanish | A form of the name Sidney, derive.. | | |
| Sidwell | English | Meaning "wide stream."
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| Sieffre | Welsh | Welsh cognate of Geoffrey. See GEO.. | | |
| Siegfried | German | Compound name composed from the Ger.. | | |
| Siegfried | Mythology a.. | Compound name composed from the Ger.. | | |
| Siegmund | Mythology a.. | Germanic compound name composed fro.. | | |
| Siencyn | Welsh | Welsh form of Jenkin (God is gracio.. | | |
| Sigbjorn | Scandinavia.. | Swedish name derived from the O.. | | |
| Sigge | Scandinavia.. | Pet form of any of the names beginn.. | | |
| Sigidi | South Afric.. | Meaning "one thousand."
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| Sigismond.. | Italian | Italian form of Sigmund, which is d.. | | |
| Sigmund | Mythology a.. | Derived from the Old Norse Sigmundr.. | | |
| Sigmund | Scandinavia.. | Derived from the Old Norse Sigmundr.. | | |
| Sigurd | German | A borrowing from the Scandinavians,.. | | |
| Sigurd | Mythology a.. | From the obsolete Old Norse Sigvor5.. | | |
| Sigurd | Scandinavia.. | From the obsolete Old Norse Sigvors.. | | |
| Sikke | Scandinavia.. | Frisian pet form of any of the name.. | | |
| Sikwaji | Native Amer.. | Derived from the Cherokee tsikwaya .. | | |
| Silas | Biblical | Derived from the Aramaic sh'ila (as.. | | |
| Silas | Greek | Ecclesiastic Greek name derived.. | | |
| Silvano | Italian | From the Latin Silvanus (of the woo.. | | |
| Silvano | Spanish | From the Latin Silvanus (of the woo.. | | |
| Silvanos | Greek | From the Latin Silvanus (of the woo.. | | |
| Silvester | English | A borrowing from the Latin, Silvest.. | | |
| Silvestro | Italian | From the Latin Silvester, which is .. | | |
| Silvino | Portuguese | From the Latin Silvanus (of the woo.. | | |
| Silvio | Italian | From the Latin silva (a forest, a w.. | | |
| Sim | Scottish | Gaelic form of Simon (heard). See .. | | |
