| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 1801 | Tanaquil | Latin | Worshipped in the home. | F | |
| 1802 | Tansy | Latin | Tenacious. | F | |
| 1803 | Tarpeia | Latin | Killed for an act of treason against her father. | F | |
| 1804 | Tava | Latin | Abbreviation of Octavia: born eighth. | F | |
| 1805 | Tavia | Latin | Abbreviation of Octavia: born eighth. | F | |
| 1806 | Tefia | Latin | Earth. | F | |
| 1807 | Telephassa | Latin | Wife of Agenor. | F | |
| 1808 | Teles | Latin | A Siren. | F | |
| 1809 | Tellus | Latin | Earth. | F | |
| 1810 | Templa | Latin | Sanctuary. | F | |
| 1811 | Temple | Latin | Reference to medieval priories and settlements of the military religious order Knights Templars. | F | |
| 1812 | Teralyn | Latin | The planet earth. Famous bearer: mythological Terra, the Roman earth goddess equivalent to the Greek Gaia. | F | |
| 1813 | Terra | Latin | The planet earth. Famous bearer: mythological Terra, the Roman earth goddess equivalent to the Greek Gaia. | F | |
| 1814 | Terrah | Latin | The planet earth. Famous bearer: mythological Terra, the Roman earth goddess equivalent to the Greek Gaia. | F | |
| 1815 | Tertia | Latin | Born third. | F | |
| 1816 | Tethys | Latin | Daughter of Gaea. | F | |
| 1817 | Thalassa | Latin | Mediterranean. | F | |
| 1818 | Theadora | Latin | God given. Feminine of Theodore. | F | |
| 1819 | Thelxepeia | Latin | A Siren. | F | |
| 1820 | Thelxiepeia | Latin | A Siren. | F | |