| 1. | TONAKAN | From Armenian ton "holiday" + akan adjective suffix. The short forms are Tonak, Tonik, Tono from which the surnames Tonakyan, Tonikyan, Tonoyan are formed. |
| 2. | TONAPET | From Armenian ton "holiday" + pet "head" i.e. "head of holiday". It is a rare name now. The corresponding surname is Tonapetyan. |
| 3. | TORGOM | From Hebrew name Thogarma or Thorgama which means "bony". It is still in use as well as the surname Torgomyan. |
| 4. | TORNIK | From Armenian torn "grandson" + ik diminutive suffix. The corresponding surname is Tornikyan. |
| 5. | TOROS | Is the short form of the name Teodoros. There are also the forms Toro, Torik as well as the surname Torosyan. |
| 6. | TOVMAZ | From Greek, Latin name Thomas; Russian Foma which means "twins" In Arm the forms Tovma and Tumas are also met. The corresponding surnames are Tovmasyan, Tumasyan. |
