Name
- Telford, Thomas, civil engineer1
- Tennant, James, mineralogist1
- Thompson, Henry, 1st Baronet, surgeon, 1820-19041
- Thompson, Silvanus Phillips, physicist1
- Thorne, Richard Thorne-, physician; KCB 18971
- Tilley, John, Knight, Secretary of the Post Office, 1813-18981
- Topley, William, geologist; FRS1
- Traill, George William, naturalist1
- Trautschold, Hermann, geologist1
- Treub, Melchior, Dutch botanist1
- Treves, Frederick, Baronet , surgeon1
- Treviranus, Ludolph Christian, botanist1
- Trimen, Henry, botanist; of the British Museum1
- Trouessart, Édouard Louis, naturalist1
- Turner, William, anatomist1
- Tweedy, John, surgeon; Knight 19061
- Twisden, John Francis1
- Tylor, Alfred, FGS1
- Tylor, Edward Burnett, anthropologist1
- Tyndall, John, FRS; of Add MS 425821