| Name | Meaning | Gender | Origin |
|---|
| Tito | Latin, meaning unknown | Male | Spanish |
| Toby | God is Good | Male | English |
| Tom | Bartender at the Leaky Cauldron.
| Male | English |
| Tommy | From Thomas - The twin. | Male | English |
| Tonto | | Male | |
| Toot | | Unisex | Hebrew |
| Topcat | | Male | |
| Topo | | Unisex | Hebrew |
| Tory | victory | Female | English |
| Totoro | after the character in the movie My Neighbor Totoro (Tonari No Totoro | Unisex | |
| Toulouse | after a kitten in the movie Aristocats | Male | |
| Trinity | Three divine persons, The Father, The Son and The Holy Spirit. | Female | Latin |
| Tristan | A knight
| Male | Celtic |
| Trixie | she who brings happiness | Female | Latin |
| Trixie | she who brings happiness | Female | Latin |
| Trouble | A cause of disturbance or difficulty. | Male | |
| Troy | Descendant of the curly haired ones | Male | Irish |
| Tucker | Tucker of doth
| Male | English |
| Tuffy | | Unisex | |
| Tulip | | Female | Hebrew |
| Turbo | Driven by a turbine - turbocharged | Unisex | |
| Tuxedo | | Unisex | |
| Tye | enclosed | Unisex | |
| Tyler | An English surname frequently used as a first name.
| Male | English |
| Tyson | son of a German, son of Ty | Male | English |