| Siddhanthaஸித்தாஂத | The ultimate truth or doctrine. |
| Siddharathaஸித்தார்தா | For Righteous Task or Mission or Purpose |
| Siddharthஸித்தார்த | Accomplished; The blessed one, Buddha, white mustard; White mustard |
| Siddharthaஸித்தார்த | A name of Lord Buddha |
| Siddharthanஸித்தார்தந | One who has fulfilled his aim. |
| Siddheshஸித்தேஷ | Lord of the blessed |
| Siddheshwarஸித்தேஷ்வர | A goddess; Lord Shiva |
| Siddheshwariஸித்தேஷ்வரீ | Goddess of all perfections. |
| Siddhiஸித்தி | Achievement; Achievement, completion; Having spiritual power; Wife of Lord Ganesh; Achievement |
| Siddhidஸித்தித | One who grants achievements. |
| Siddhidhataஸித்திதாதா | Bestower of success and accomplishments |
| Siddhikஸித்திக | One who attains great success. |
| Siddhikshaஸித்திக்ஷா | A Religious Ceremony; Goddess Laxmi |
| Siddhimaஸித்திமா | Possessor of divine powers. |
| Siddhipriyaஸித்திதாதா | Bestower of wishes and boons |
| Siddhivinayakaஸித்திவிநாயக | Bestower of success and accomplishments |
| Siddhnathஸித்தநாத | Master of spiritual wisdom. |
| Siddhrajஸித்தராஜ | Lord of perfection |
| Siddhranஸித்தரண | One who achieves his goals. |
| Siddhuஸித்து | Very Peaceful; Goutham Budda |
| Siddiஸித்தீ | Achievement; Wife of Lord Ganesha |
| Siddikshaஸீத்தீக்ஷா | One who possesses deep knowledge. |
| Sidduஸித்தூ | A term for a wise or gifted person. |
| Sidhan | Enlightened; also Siddan, Sithan |
| Sidharthஸிதார்த | Lord of the Blessed; Lord Buddha |
| Sidharthaஸித்தார்த | One who has achieved a goal. |
| Sidheshஸீதேஷ | Lord of Shiva; Lord of the Blessed; Lord Ganesh; Proved |
| Sidhiஸீதீ | Success; Perfection; In Worship; Completion; Wife of Lord Ganesha |
| Sidhimaஸீதீமாஂ | Achievement or great success. |
| Sidhuஸித்தூ | Nectar,sprit distilled from molasses |
| Sihagஸிஹாக | A name meaning a brave warrior. |
| Sihiஸிஹி | A name meaning a cold breeze. |
| Sikataஸிகதா | One who is very fortunate. |
| Sikhaஷிகா | Light; The Fire of a Candle; Peaceful; Content |
| Sikhiஸீக | With Tuft of Hair |
| Siktaஸிக்தா | Moistened or sprinkled with water. |
| Siladityaஷிலாதித்ய | A person with the radiance of a rock. |
| Silambanஸிலம்பந | One who is skilled in martial arts. |
| Silambu | Name of an Ornament |
| Silpaஷில்பா | Like a Sculpture - Beautiful; A Perfect Charming Boy |