| Tabin | Tacchini | Taccoz |
| Taffiner | Tagan | Tallagnon |
| Tamborini | Tamini | Tannast |
| Tannio | Tapparel | Taramarcaz |
| Taugwalder | Tavelli | Tavernier |
| Tcheinen | Tempel | Tenisch |
| Tenud | Teobaldi | Terrani |
| Terraz | Terrettaz | Téte |
| Thalmann | Theiler | Theler |
| Thenen | Thenisch | Théodoloz |
| Théoduloz | Thétaz | Theules |
| Theux | Thevenon | Thévenot |
| Thevtaz | Thiessoz | Thieux |
| Thomas | Thünen | Thora (de) |
| Thurre | Tichelli | Tillier (de) |
| Tissičres | Tissonnier | Tobler |
| Tochet | Toffnl | Togni |
| Tollen (de) | Tonossi | Torello |
| Tormaz | Tornav | Tornery (de) |
| Torney | Torrent | Torrenté (de) |
| Torrione | Torsat | Torti |
| Tour de Saint-Maurice de la | Tournier | Tousard d’Olbec |
| Traschsler | Traveletti | Trever |
| Tridondane | Triebmann | Trincherini |
| Trinchero | Triono (de) | Trisconi |
| Troger | Troillet | Trollé |
| Troller | Trombert | Tronchet |
| Trönli | Trönlin | Trorer |
| Trossard | Trosseli | Trosset |
| Trottet | Trovaz | Trubmann |
| Truchard | Truffer | Tschampen |
| Tscherrri | Tscherry | Tschieder |
| Tschtill | Tschopp | Turin |