| Tim | | TIM (English, German, Dutch, Slovene) | English, German, Dutch, Slovene, Swedish, Norwegian, Danish | |
| Timo (1) | | TEE-mo | Finnish, German, Dutch | |
| Timo (2) | | TEE-mo | German, Dutch | |
| Timotheus | | - | Biblical Latin, German, Dutch | |
| Tobias | | to-BEE-ahs (German), tə-BIE-əs (English) | Biblical, German, Swedish, Norwegian, Danish, English, Biblical Latin, Biblical Greek | |
| Torben | | TOR-ben (Danish), TAWR-ben (German) | Danish, German | |
| Torsten | | TOSH-ten (Swedish), TAWR-sten (German) | Swedish, Danish, German | |
| Traudl | | - | German | |
| Traugott | | - | German | |
| Trudi | | TROO-dee | German, English | |
| Udo (1) | | OO-do | German | |
| Ueli | | - | German (Swiss) | |
| Ulla | | OOL-lah (Finnish) | Swedish, Danish, Norwegian, Finnish, German | |
| Ulli | | - | German | |
| Ulrich | | UWL-rikh (German) | German, French, Ancient Germanic | |