– William Theobald (1829–1908)* Thiele – Johannes Thiele (1860–1935)* Thomas – أولدفيلد توماس (1858–1929)* Thomson, J. Thomson – James Thomson (entomologist) (1828–1897) entomology, primarily Coleoptera and Hymenoptera* C.G.
– William Theobald (1829–1908)* Thiele – Johannes Thiele (1860–1935)* Thomas – Oldfield Thomas (1858–1929)* Thomson, J. Thomson – James Thomson (entomologist) (1828–1897) entomology, primarily Coleoptera and Hymenoptera* C.G.