Josephus wrote that he became ancestor of the "Thirasians" (Thracians). These were the first fair-haired people mentioned in antiquity according to Xenophanes, and were later known as the Getae according to historians beginning with Herodotus (4.93, 5.3). Tiras or Tyras in antiquity was also the name of the Dniester river, and of a Greek colony situated near its mouth. Some have suggested that Tiras was worshiped by his descendants as Thuras, or Thor, the god of thunder. The earliest Norse sagas name Thor as an ancestral chieftain, and trace his origins to Thrace. The Germanic peoples also worshiped a god called Tiwaz, whose name was rendered Tyr/Tir in Scandinavian languages, and Tiw in Old English.
The medieval rabbinic text Book of Jasher (7:9) records the sons of Tiras as Benib, Gera, Lupirion, and Gilak, and in 10:14, it asserts that Rushash, Cushni, and Ongolis are among his descendants. An earlier (950 AD) rabbinic compilation, the Yosippon, similarly claims Tiras' descendants to be the Rossi of Kiv, ie. Kievan Rus, listing them together with his brother Meshech's supposed descendants as "the Rossi; the Saqsni and the Iglesusi".
Another mediaeval Hebrew compilation, the Chronicles of Jerahmeel, aside from quoting Yosippon as above, also provides a separate tradition of Tiras' sons elsewhere, naming them as Maakh, Tabel, Bal’anah, Shampla, Meah, and Elash. This material was ultimately derived from Pseudo-Philo (ca. 75 AD), extant copies of which list Tiras' sons as Maac, Tabel, Ballana, Samplameac, and Elaz.
The Persian historian Muhammad ibn Jarir al-Tabari (c. 915) recounts a tradition that Tiras had a son named Batawil, whose daughters Qarnabil, Bakht, and Arsal became the wives of Cush, Put, and Canaan, respectively.