| Name | Meaning | Religion | Gender |
|---|
| Siddhani | Blessed | Hindu | Girl |
| Siddhant | | Jain | Boy |
| Siddhanta | Principle | Hindu | Boy |
| Siddharth | White mustard | Hindu | Boy |
| Siddharth | Father of lord Mahavir | Jain | Boy |
| Siddhartha | Lord Buddha | Hindu | Boy |
| Siddhesh | Lord of the blessed | Hindu | Boy |
| Siddheshwar | Lord Shiva | Hindu | Boy |
| Siddheshwari | Lord Shiva | Hindu | Girl |
| Siddhi | Achievement, Ever ready to protect, Goddess | Hindu | Girl |
| Siddhi | Ability of success | Jain | Girl |
| Siddhidhata | Bestower of success and accomplishments | Hindu | Boy |
| Siddhiksha | Goddess Laxmi, Religious ceremony | Hindu | Girl |
| Siddhima | Achievement | Hindu | Girl |
| Siddhipriya | Bestower of wishes and boons | Hindu | Boy |
| Siddhivinayaka | Bestower of success and accomplishments | Hindu | Boy |
| Siddhraj | Lord of perfection | Hindu | Boy |
| Siddhran | Perfection | Hindu | Boy |
| Siddid | Lord Shiva | Hindu | Boy |
| Siddiqah | Strictly veracious, Honest | Muslim | Girl |
| Siddu | Lord Shiva | Hindu | Boy |
| Sidharth | | Jain | Boy |
| Sidhesh | | Jain | Boy |
| Sidhi | Perfection, Completion, Wife of lord Ganesh | Hindu | Girl |
| Sidney | St. Denis | Christian | Unisex |
| Sidrah | Name of a tree | Muslim | Girl |
| Siena | Reddish Orange | Christian | Girl |
| Sienna | Reddish Orange | Christian | Girl |
| Sierra | Mountain range | Christian | Girl |
| Sigmund | Protector of victory | Christian | Boy |
| Sihaam | Arrows | Hindu | Boy |
| Sihaam | Arrows | Muslim | Girl |
| Siham | | Jain | Boy |
| Siham | Arrows | Muslim | Girl |
| Sihanli | | Jain | Girl |
| Sihesh | | Jain | Boy |
| Sikandar | Victorious | Hindu | Boy |
| Sikata | Sand | Hindu | Girl |
| Sikta | Wet | Hindu | Girl |
| Sila | Wife of lord Ram | Hindu | Girl |
| Silam | | Jain | Boy |
| Silamban | Lord Murugan | Hindu | Boy |
| Silas | From the forest | Christian | Boy |
| Silver | Silver, Precious | Christian | Unisex |
| Silvester | Forest, Wood, From the woods | Christian | Boy |
| Silvia | From the forest | Christian | Girl |
| Sim | Hearkening | Christian | Boy |
| Sima | Face | Muslim | Girl |
| Simali | | Jain | Girl |
| Simandhar | | Jain | Boy |
| Simantika | Light | Hindu | Girl |
| Simar | One who is absorbed in god | Sikh | Boy |
| Simardeep | Lamp of remembrance of god | Sikh | Boy |
| Simarleen | Absorbed in remembrance of god | Sikh | Boy |
| Simbala | Pond | Hindu | Girl |
| Simbar | | Parsi | Girl |
| Simbiat | Brave woman | Muslim | Girl |
| Simeon | Hearkening | Christian | Boy |
| Simha | | Hindu | Boy |
| Simin | Silvery, Made of Silver | Muslim | Girl |
| Simin | | Parsi | Girl |
| Simindokht | | Parsi | Girl |