| Name | Meaning | Favorites |
| Siddeeq | A true friend, Just, One who is true in word and deed, Sincere | |
| Siddiq | A true friend, Just, One who is true in word and deed, Sincere | |
| Siddiqah | One who keeps her word | |
| Sidra | Of the stars | |
| Sihaam | Arrows | |
| Siham | Arrows | |
| Silaah | Armour, Arms, Weapons | |
| Sima | Face | |
| Simin | Silvery | |
| Siraaj | Lamp, Light | |
| Siraj | Lamp | |
| Sirhan | Wolf | |
| Sitarah | Star | |
| Sivia | A deer | |
| Sivya | A deer | |
| Sofian | Devoted | |
| Sohail | Moon-glow | |
| Soheil | Star | |
| Soheila | Star | |
| Sohrab | A character in Shahnameh, Shining | |
