- Sahagun, [10], [17]
- Samucu, [20]
- Schultz, Rev., [18]
- Shawnees, [19]
- Smith, B., [13]
- Standard Dictionary, the, [7]
- Steinthal, H., [6]
- “Stone of the Giants”, [16]
- Svastika, the, [20]
- Tacana, [19]
- Taensa, [13]
- Taino, [18]
- Tamanaca, [6]
- Tarascos, [16]
- Tehuelche, [19]
- Teknnika, [19]
- Tequistlatecan, [7]
- Timote., [7]
- Timuquana, [13]
- Tinné, [18]
- Toltecs, the, [20]
- Totonaco, [6]
- Triquetrum, the, [20]
- Tsoneca, [19]
- Tucanos, [19]
- Tupi, [6], [8], [20]
- Tzental, [16]
- Ulvas, [16]
- Verb, the American, [6]