| Shona | Irish | Anglicized form of Sine, the Gaelic.. |  |  |
| Siadhal | Irish | Ancient name derived from siadhail .. |  | |
| Siany | Irish | Anglicized form of the Gaelic Slain.. |  | |
| Sile | Irish | Gaelic form of Cecilia and Cecily (.. | | |
| Simon | Irish | Ecclesiastic Late Latin form of the.. | | |
| Sine | Irish | Gaelic form of Jean, which is a fem.. | | |
| Sinead | Irish | Popular Gaelic form of Jane, a femi.. | | |
| Siobhainin | Irish | Diminutive form of Siobhan, the Gae.. | | |
| Siobhan | Irish | Popular Gaelic form of Joan, a femi.. | | |
| Siomon | Irish | Gaelic form of Simon (heard). See .. | | |
| Siseal | Irish | Irish form of Cecil (blind). See C.. | | |
| Sisile | Irish | Gaelic form of Cecilia and Cecily (.. | | |
| Sive | Irish | Irish form of Sadhbh (goodness). Se.. | | |
| Sivney | Irish | Anglicized form of Suibhne (well-go.. | | |
| Slaine | Irish | Old name meaning "health." Siany an.. | | |
| Slania | Irish | Latinate form of Slaine, a Gaelic n.. | | |
| Slanie | Irish | Anglicized form of Slaine, a Gaelic.. | | |
| Sloan | Irish | Means "warrior" and is sometimes sp.. | | |
| Sloane | Irish | Meaning "fighter" | | |
| Somhairle | Irish | Irish form of Sumerlidi, the Old No.. | | |
| Sophia | Irish | A borrowing from the English, Sophi.. |  | |
| Sorcha | Irish | Old name meaning "bright, clear." I.. | | |
| Sorley | Irish | Original Anglicized form of Somhair.. | | |
| Stanley | Irish | Transferred use of the English surn.. | | |
| Steafan | Irish | Popular Gaelic form of Stephen (a c.. | | |
| Stephen | Irish | From the Latin Stephanus, which is .. | | |
| Steve | Irish | A short form of Steven (a crown, a .. | | |
| Suibhne | Irish | Old name derived from suibhne (well.. | | |
| Susan | Irish | Brought to Ireland by the Anglo-Nor.. | | |
| Susanna | Irish | Gaelic form of Susan (lily, rose). .. | | |
| Sweeney | Irish | Meaning "small hero." | | |
| Tadhg | Irish | Very old name derived from the Gael.. | | |
| Tady | Irish | Means "poet" and is the Irish versi.. | | |
| Taidhgin | Irish | Diminutive form of Tadhg (poet, phi.. | | |
| Tanith | Irish | Derived from the Old Irish tan (an .. | | |
