Tudhaliya (also Tudhaliya I) is a hypothetic pre-Empire king of the Hittites. He would have reigned in the late 17th century BC (short chronology). Forlanini (1993) conjectures that this king corresponds to the great-grandfather of Hattusili I.
Tudhaliya I (also Tudhaliya II), ruled ca. 1430 to 1400 BC
Tudhaliya II (also Tudhaliya III), ruled ca. in the 1380s BC
Tudhaliya III (also "Tudhaliya the child") may have briefly ruled around 1358 BC.