| Sparlay | Spring Season. |
| Souban | A companion, Returning |
| Somood | Steadfastness, firmness, endurance. |
| Sohrab | of Shahnama fame, Champion, name of a Persian warrior. |
| Sohail | Gentle, ease; name of star. |
| Snober | A cone-bearing tree, fir. |
| Slaeet | Sharp-tongued. |
| Siyaf | Sword player, swordsman. |
| Siwar | Bracelet, Arm-ring. |
| Sirajuddin | Lamp of the religion (Islam). |
| Sirajud Dawlah | Lamp of the state. |
| Siraj | Lamp, light, the sun, candle. |
| Sinanuddin | Spear of the religion (Islam). |
| Sinan | Spear. Umm Sinan: a sahaabia i.e. a woman who lived in Prophet Muhammad’s time. |
| Simak | Arcturus (Star). |
| Silm | Peace. |
| Silan | A diamond, part of sword which is sheathed. |
| Silahuddin | Armour of the religion (Islam). |
| Silah | Arms, armour, weapons. |
| Sikandar | Alexander. |
| Siham | Arrows; pl. of Sahm. |
| Siffat | Praise. |
| Siddiqullah | The truthful (one) to Allah. An epithet of Prophet Yusuf. |
| Siddiqui | Attributed to the first Khalifa Abu Bakr Al-Siddiq (d.634) through ancestry. |