Encyclopedias, Almanacs, Transcripts, and Maps
- Thompson, William Boyce
- Thompson, William Hale
- Thomsen, Vilhelm
- Thomson effect
- Thomson, Charles
- Thomson, Charles Edward Poulett
- Thomson, Sir John Arthur
- Thon Buri
- Thorbecke, Jan Rudolf
- Thorndike, Lynn
- Thorning-Schmidt, Helle
- Thornton, Matthew
- Thorold
- thoron
- thorough bass
- thoroughwort
- Thorshavn
- Thothmes
- Thou, Jacques Auguste de
- thought reading