| Name | Gender | Meaning | Favorites |
| Siddhanta | Boy | Principle | |
| Siddharth | Boy | Accomplished, Father of Lord Mahavir | |
| Siddhartha | Boy | A name of Lord Buddha, One who has accomplished his aim | |
| Siddheshwar | Boy | A goddess | |
| Siddhi | Girl | Achievement, Ever ready to protect, Goddess, Lord Shiva | |
| Siddhran | Boy | Perfection | |
| Sidhesh | Boy | Lord of the blessed | |
| Silambarasan | Boy | The best | |
| Simran | Girl | God’s gift | |
| Simrit | Girl | Remembered | |
| Sinchana | Girl | Sprinkle | |
| Sindhu | Girl | Ocean, River | |
| Singaravelan | Boy | Lord murugan | |
| Sinha | Boy | Hero | |
| Sita | Girl | Wife of Lord Rama | |
| Sitakanta | Boy | Lord Rama | |
| Sitara | Girl | A star | |
| Sitikantha | Boy | Lord Shiva | |
| Siva | Boy | God Sivan | |
| Sivabalan | Boy | Son of God Sivan | |
