| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 341 | Ryons | ArthurianLegend | A Welsh king. | M | |
| 342 | Sagramour | ArthurianLegend | A knight. | M | |
| 343 | Sagremor | ArthurianLegend | A knight. | M | |
| 344 | Saveage | ArthurianLegend | Sister of Lyones. | F | |
| 345 | Sebille | ArthurianLegend | A fairy. | F | |
| 346 | Shalott | ArthurianLegend | Land of Astolet. | F | |
| 347 | Sigune | ArthurianLegend | Percival's cousin. | F | |
| 348 | Soredamors | ArthurianLegend | Gawain's sister. | F | |
| 349 | Taliesin | ArthurianLegend | Sixth century poet. | M | |
| 350 | Tentagil | ArthurianLegend | Land of Igraine. | M | |
| 351 | Tintagel | ArthurianLegend | Land of Igraine. | M | |
| 352 | Tor | ArthurianLegend | Son of Pellinore. | M | |
| 353 | Trevrizent | ArthurianLegend | Percival's uncle. | M | |
| 354 | Tristan | ArthurianLegend | A knight. | M | |
| 355 | Tristen | ArthurianLegend | Tumult; outcry. From the Celtic name Tristan. In Arthurian legend Tristan was a Knight of the Round Table and tragic hero of the medieval tale Tristram and Isolde. | M | |
| 356 | Tristian | ArthurianLegend | Tumult; outcry. From the Celtic name Tristan. In Arthurian legend Tristan was a Knight of the Round Table and tragic hero of the medieval tale Tristram and Isolde. | M | |
| 357 | Tristin | ArthurianLegend | Tumult; outcry. From the Celtic name Tristan. In Arthurian legend Tristan was a Knight of the Round Table and tragic hero of the medieval tale Tristram and Isolde. | M | |
| 358 | Tristram | ArthurianLegend | A knight. | M | |
| 359 | Tryamon | ArthurianLegend | A fairy princess. | F | |
| 360 | Urien | ArthurianLegend | Name of a king. | M | |