| Theophilus | | thee-AHF-ə-ləs (English) | Biblical, Ancient Greek (Latinized) | |
| Theophylaktos | | - | Ancient Greek | |
| Theothelm | | - | Ancient Germanic | |
| Theotimos | | - | Ancient Greek | |
| Theotimus | | - | Ancient Greek (Latinized) | |
| Theotleip | | - | Ancient Germanic | |
| Theotman | | - | Ancient Germanic | |
| Therasia | | - | Late Roman | |
| Theresa | | tə-REE-sə (English), tə-RAY-zə (English), te-RE-zah (German) | English, German, Swedish, Norwegian, Danish | |
| Therese | | te-RE-zə (German), te-RES (Swedish), tə-REES (English) | German, Swedish, Norwegian, Danish, English | |
| Theresia | | tə-RAY-see-ah (Dutch) | German, Dutch, Swedish | |
| Theron | | - | Ancient Greek | |
| Theudelinda | | - | Ancient Germanic | |
| Theudemar | | - | Ancient Germanic | |
| Theudhar | | - | Ancient Germanic | |